Re: Disc Brake Upgrade Reference Thread
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It's also threaded on the inside. That's where you connect your hard brake line. http://i1106.photobucket.com/albums/...5/IMAG0615.jpg Posted via Mobile Device |
Re: Disc Brake Upgrade Reference Thread
I totally overlooked the inside, they seem a little hard to get the flared tube past the treads, but I'll investigate further tomorrow. Thanks, I was thinking I'd have to buy custom brake lines.
Much appreciated! Posted via Mobile Device |
Re: Disc Brake Upgrade Reference Thread
i have a question that i havent seen yet. i have a 64 gmc and i found a 67-72 chev at a junk yard with 5 lugs and discs should the spindles bolt right up or would i need to change control arms out. any help would be awesome
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Re: Disc Brake Upgrade Reference Thread
Wats up been a while but heres my problem changed my front end on my 65 gmc to a 73 c10 five lugs im tryin to figure out if i can use standard grade 8 bolts on the upper control arm where the shims rest on beside puttin those standard stud bolts Back in
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Re: Disc Brake Upgrade Reference Thread
Yes the '71-'72 spindles will bolt up to your original control arms,as long as you install the '71-'72 ball joints. If you want to get the '71-'72 control arms along with the spindles, they will bolt up to your '64 GMC crossmember
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Re: Disc Brake Upgrade Reference Thread
If you don't use the original style studs, you would have to stitch weld the grade 8 bolts, so they don't spin. If it were mine, I would check into getting replacement OEM style studs.
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Re: Disc Brake Upgrade Reference Thread
awesome! i think thats what ill do, shouldnt be too much. thanks captainfab.
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Re: Disc Brake Upgrade Reference Thread
My question isn't as involved as the others. I have a 77 2wd Blazer not sure which rotors I have. If I find that i have the 1" what will it take to upgrade to the 1.25" I assume its a little upgrade. Where do you measure to see which ones you have.
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Re: Disc Brake Upgrade Reference Thread
All depends on the calipers, are you using the calipers from the same donor vehicle..?
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Re: Disc Brake Upgrade Reference Thread
I'm not sure whats on my blazer, but if I want 1.25" rotors Will I need 1.25" calipers also? I there anything else besides rotors and calipers that are different?
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Re: Disc Brake Upgrade Reference Thread
The spindle is also different for the 1.25" rotors versus the 1" thick rotors.
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Re: Disc Brake Upgrade Reference Thread
I have read through this whole thread and for what ever reason some where on this site in the past ( not this thread ) I thought that I had read that doing a cross member swap moved the front wheels forward about an inch or so when using a later cross member
now based on what I have read here that may not be the case but can someone clarify? |
Re: Disc Brake Upgrade Reference Thread
I'm not aware of any wheelbase changes resulting from the crossmember swap. But then again, I have not checked either. Just the change to discs, does increase the track width a bit though.
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Re: Disc Brake Upgrade Reference Thread
great thread and very complete! let me ask about the rearend does anyone have any pic's of the 73-87 rearend into the 65' C10? thanks!
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Re: Disc Brake Upgrade Reference Thread
What a wealth of information, thanks for putting it all together in one place to read through.
I have a scenario I would like some input on. As you can see from my screen name I have on of these. I want to to the front disk upgrade and have read through all the posts, WOW. Driving by a wrecking yard today I noticed a 79 C20 being loaded onto the back of a flatbed. I flipped a u turn and inquired about the truck. The truck was stripped except for the front crossmember and all the suspension and brakes, a complete front end. I asked the guy if I could buy it and he said 50 bucks. I jumped on it as my time and effort of tracking down all the parts or pulling them off a truck in a pick and pull yard is not what I consider a good time. He brought out a cutting torch and just cut off the frame rails of the 79 C20 and loaded it in my truck. He cut the hard lines to the brakes but I am sure I will have to create my own there. My question is should I do the complete crossmember swap or should I swap the various pieces over to the crossmember on my 65. Which would be easier is what I am asking. Thanks for all the info that this site provides! |
Re: Disc Brake Upgrade Reference Thread
Well from a easier perspective, just switching the ball joints, spindles, rotors, calipers, etc. would be the easiest. The '79 lower control arms will not bolt up to your '65's crossmember, since there are no saddles there.. If your '65 has the engine in it, switching the crossmember can be done, but it is a bit more of a challenge. If the engine is out, it's a piece of cake. Did you get the steering box with the front suspension?
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Re: Disc Brake Upgrade Reference Thread
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The motor is still in my 65. I may just swap the pieces over then and leave the engine in the vehicle. One other question, since the front crossmember is out of the vehicle I can no longer use the jack stand and floor jack to release pressure one the coil spring. I don't want it to explode in my face, any suggestions besides wrapping a tie down strap around the upper and lower arms? |
Re: Disc Brake Upgrade Reference Thread
I've not had an issue with disassembiling a front suspension out from the truck. I just stand to the side when I hit the lower boss on the spindle to release the lower ball joint. If you're worried about it, tie a rope or a ratchet strap to the spring and to somewhere else on the suspension, to keep it in place.
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Re: Disc Brake Upgrade Reference Thread
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Full X-member vs component swap and power steering upgrade…?
First of all, thank you to everyone for the wealth of info. This is my first post, though I have been reading this forum for quite some time. I think I have this all figured out, but there are a couple points that I would like some confirmation/correction on. Can someone please review and tell me what I am missing… My truck: ’66 GMC 1000, 305 V6 This is my daily driver, so ultimately I’m looking for the least amount of down time for the truck. A weekend would be stellar. In the end I want to have front power disc brakes and power steering, though the brake upgrade takes priority over the steering upgrade. From reading this thread, I have gathered that a full cross member swap would be least amount of future maintenance the least amount of down time if I rebuild all necessary parts on the donor suspension (don’t have a donor yet) and bolt on some aftermarket 6 lug rotors prior to putting my truck on jack stands. What can I expect to run into with the engine in the truck? I'll likely need to drill/"stretch" some holes, what else? According to post #197 I may not even need to drill any holes… But according to posts #216-217 this is not the easiest way of swapping… If I upgrade steering at the same time, surely there are other things to do. I have not searched the forum for steering upgrade threads yet. I have read CPP’s page on how to do it, but their instructions are based on my ’66 suspension. What do I need to grab from the donor vehicle to make the steering upgrade as complete and painless as possible? (suggested links?) I’ve never taken on a project quite this large (on my own) but have plenty of experience otherwise. Just don’t want to get myself half way through and start kicking things in frustration… Also, my truck has aftermarket wheels. If there is going to be a caliper clearance issue with my wheels, where would it be? What part of the wheel should I measure to see if they will work? Necessary adapters...?: brake booster adapter plate, power steering box adapter plate, possible brake line fitting adapters, what else? Donor requirements…?: 1.25” rotors ’73-’87 pickup; ’73-’91 suburban And finally: can I use a 1987 G20 Conversion Van as a donor? Thank you in advance! Here's the truck as it currently stands, all stock... except for the bed of course. |
Re: Disc Brake Upgrade Reference Thread
Since your truck is a 1/2 ton and you don't plan on removing the engine, I would just swap the control arms, and everything outward from there. As always I do recommend upgrading to the larger diameter lower control arm shaft U-bolts. This will require drilling out the holes in the crossmember.
As for the steering, you will of course need the steering box with the pitman arm. And I recommend using the newer steering linkage, complete from spindle to spindle. This will require drilling holes for the newer style idler arm. I just take measurements from the donor truck, to locate the idler arm on the early frame and drill the holes. You will also need a steering box adapter plate. I sell those along with the tube and flange, which makes the installation a little easier, You can also use the lower steering column shaft from the donor if you like. And don't forget you will need a power steeering pump, mounting brackets, pulleys and hoses. The pulleys and brackets will need to be specific to the engine you are using. In your case, the GMC V6, which can be hard to find. You might consider fabbing some, or having someone do it for you if you don't have the means. If upgrading to power brakes also, you can use the booster and master from the donor if you like. I also sell booster brackets, that work with a few specific boosters that are commonly available. These are a direct bolt onto your firewall. I don't know for certain on the '87 G20 parts, but I do know that a '85 G20 would work. I would think the '87 would be the same, but I would verify before purchasing. Maybe do a part interchange at an auto parts store, to see. If you are planning on the aftermarket 6 lug conversion rotors, then you will need the spindles for the 1.250 thick rotors. |
Re: Disc Brake Upgrade Reference Thread
Thanks Captainfab!
I cross referenced as many parts as I could think of from '87 G20 to '85 G20 (from Oreilly auto parts) and the only thing that I could find different is the Control Arm Shaft Kit. However, when crossing the entire Control Arm Assembly which includes the shaft, the parts numbers are the same. Any thoughts as to the difference there? Otherwise, it looks as though I may have found a good donor. If so I will be contacting you for those adapter plates. Thanks again for the help. |
Re: Disc Brake Upgrade Reference Thread
To be more exact, only the front upper control arm shaft kit parts numbers are different. The lower shaft parts numbers are the same. Also cross referenced to '85 C10 with the same results. '85 c10 upper shaft = '85 G20 upper shaft but not equal to '87 G20 upper shaft...
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Re: Disc Brake Upgrade Reference Thread
Hmmmm, I wonder what the difference is with the '87 G20 upper shaft? If you can get the van cheap enough, you might try it and see if the upper control arms will work on your truck.
Also I don't believe I mentioned that the G series van front suspension crossmembers are not interchangeable with the pickups. |
Re: Disc Brake Upgrade Reference Thread
Thanks again for the info Captainfab. Parts compatibility from the G20 is currently a moot point as the guy that has it for sale is keeping the front end to do exactly the same conversion on his '63 C10.
Visual inspection of the shafts on NAPA's website shows no difference, but I did not get a chance to check them in person. Back to hunting for a donor for now... will contact you for adapter plates when I find one. Thanks |
Disc Brake Upgrade Thread 1960 3/4 Ton C-10
1960 C-10 3/4 ton Step side
4 wheel drum brakes I did not see options for the 1960. I want to get the least expensive conversion done for front and rear disc brakes, power steering, and power brakes. I plan to install disc brakes in the rear at a later time, so I want to convert with that in mine. For now, I want to convert to front disc brakes. I need to know what year donor vehicles' parts will bolt on for the conversion. Please advise. I want to go with power steering and power brakes on this 1960. Please advise what year donor vehicles will bolt on. The master cylinder on the 1960 has 3 bolts mounting it to the firewall. I notice that all of the other master cylinders have 4 bolts mounting the master cylinder to the firewall. Please advise a solution. |
Re: Disc Brake Upgrade Thread 1960 3/4 Ton C-10
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Performance online sells them for $229.00 every day. They also have 10% off until the end of the year. Look here: http://www.performanceonline.com/196...dle-Set-16683/ |
Re: Disc Brake Upgrade Reference Thread
Thanks, Keith,
Now, about the hub, caliper, and rotors. Please advise if I can use the existing hubs. Also, what year caliper can I get from the salvage yard? I can buy a new rotor from the parts house. What year do I ask for. I will go with the 6-lug since I have the 6-lug on the rear. Please advise - thanks |
Re: Disc Brake Upgrade Reference Thread
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Performance Online sells them also. http://www.performanceonline.com/FRO...10-TRUCK-8600/ (If you want 5-lug then you can get them at your local parts house). Just ask for 1973 1/2-ton truck parts. These will be the required 1-1/4" rotor version to match your spindles and these aftermarket 6-lug rotors. I would buy new calipers, bearings and brake hoses. These parts are cheap. Plus it's your brakes we are talking about. |
Re: Disc Brake Upgrade Thread 1960 3/4 Ton C-10
You can change your entire front suspension to the '73-'87 suspension and do away with the torsion bars. It is a little more work (hole drilling) than on the '63-'66's, but it has been done by many.
I know there is a thread or two on here that describes the '60-'62 suspension swap in more detail, but I can't find it at the moment. I believe markeb01 started one of them. I can help with the power brake conversion bracket, but I don't have a power steering adapter plate for the '60-'62's at this time. Quote:
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Re: Disc Brake Upgrade Reference Thread
so in a nutshell i can just pull the entire crossmember out of a 73-87 and bolt it in my 65 with maybe a few holes drilled, then if i want to keep the 6 lugs just order new rotors and call it good? cause that sounds like the easiest, fastest and cheapest route for me.
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Re: Disc Brake Upgrade Reference Thread
You can do the conversion that way if you like, but it is definitely easier without an engine in place. You will have to drill one hole on each side, and elongate one hole on each side. This is a quick and easy way to do the conversion, if rebuilding toe entire front suspension in not necessary or not in the budget currently.
The disc brake upgrade can also be done by removing everything from the donor crossmember and bolting up to your existing crossmember. The later model lower control arm shaft U-bolts are larger diameter than the early ones. I recommend drilling out your crossmember and using the larger diameter U-bolts. You can also keep your existing control arms, and just change the ball joints and add the spindles, rotors, calipers, etc. You can use the aftermarket 6 lug rotors, as long as you have the HD spindles with the 1.250" thick rotors. Quote:
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Re: Disc Brake Upgrade Reference Thread
suscribe
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Re: Disc Brake Upgrade Reference Thread
Well .... I started the process of sloooowly collecting parts for my conversion.
I picked up some A-arms and a center steering arm from a late 70's because I wanted rubber bushings. I just lowered a customers '96 1500 using dropped spindles, so I now have the stock spindles as an option. I'm thinking about reworking the lower a-arm to except the correct ball-joint. NOTE: When looking for a-arms at a wrecking yard...find a greasy truck !! (LOL, we found a grease free truck, surface rust, man it took all day to wrench those fasteners off...:lol:) |
Re: Disc Brake Upgrade Reference Thread
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This may have been covered already. I'm running vintage American Racing Turbine wheels (6 lug) and don't wanna give them up. If upgrading to 6 lug disc brakes will it affect my wheel backspacing? Pretty much will I be able to keep my wheels without it looking stupid? Here's a pic of my truck. Keep in mind I haven't lowered the front yet in the pic (in progress). 4 wheel drums right now.
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Re: Disc Brake Upgrade Reference Thread
When switching to front disc brakes, it does increase your track width some. I just don't remember exactly how much.......I wanna say 1-1/2". There is a brand of dropped spindle that is supposed to compensate for some of that, but there again I don't remember what brand. Hopefully someone that knows will chime in. Sorry I couldn't be more help.
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Re: Disc Brake Upgrade Reference Thread
Thanks CaptainFab! Hopefully someone can help shed some more light on this for me. Anyone???
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Re: Disc Brake Upgrade Reference Thread
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According to Justin at Scotts Hot Rods in the following thread (post #74) the CPP Old School New School spindles do the same. I haven't done any research to verify this yet. CPP doesn't show these on their website and the only place I've heard about them is through this thread. http://67-72chevytrucks.com/vboard/s...=485760&page=3 Another thread I just found. http://67-72chevytrucks.com/vboard/s...d.php?t=485760 |
Re: Disc Brake Upgrade Reference Thread
THanks for posting. I was thinking it was the CPP modulars, but wasn't positive. I did not know that there were possibly other spindles that move the wheels in.
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Re: Disc Brake Upgrade Reference Thread
Thanks Slow Build! Very helpful to know. So for what I'm talking about wanting to do the CPP modular spindles will be my best option. They will still push out my track width 3/4" on each side. But it's only that little bit and wayy less than other spindles. I think I can live with that, and looks like I can keep my wheels! :D
Couple more questions for you guys. 1. To run my 15" wheels will I need to run the 12" rotors or can I go with the 13"? 2. If I wanted to go 4 wheel discs (add discs in the rear) Would that affect wheel spacing and how much? Thanks guys, sorry to be a bother. I'm sure all this has been covered before at some point. Just wanna get my facts straight for when I do all this. :) |
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