Re: Disc Brake Upgrade Reference Thread
OOOOk, which ones are you saying are incorrect part numbers?
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Re: Disc Brake Upgrade Reference Thread
the only one i think was the inner and utter beaaring a seal br3 and 5 with to brake shoes and 19984 inner seal went to another part but the rest were ok
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Re: Disc Brake Upgrade Reference Thread
Well I just looked this up again, and of course O'Reilly's have changed to their brands of parts. All of these part numbers were for the brand of parts that were on the site when they were CSK. So since they no longer carry CR seals, I couldn't verify that part number, but I can check on that tomorrow. As for the bearings, it still shows a set #5 for the inner and a set #3 for the outer. The only difference is the prefix has changed to a 'A' from a 'BR' due to the brand change.
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Re: Disc Brake Upgrade Reference Thread
thanks captain
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Re: Disc Brake Upgrade Reference Thread
I checked on that part number for the seal, and that is the correct one.
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Re: Disc Brake Upgrade Reference Thread
I am getting all the parts together and I have 2 questions for you CaptFab.
1. I'm using the 6 lug rotors, same p/n as you posted. Is there a dust cap available? Everywhere I go says n/a. 2. Is the fitting on the 88+ brake hoses the same as the old inverted flair on the hard line or are they metric bubble requiring an adapter? Thanks! |
Re: Disc Brake Upgrade Reference Thread
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Re: Disc Brake Upgrade Reference Thread
OK I have an update.
The dust caps for the '73-'87 C10 5 lug rotors will fit the '88-'98 6 lug rotors. Also the '88-'98 5 lug rotors use the same size dust cap. Those should be easy enough to find. Regarding the front brake hoses. I checked one that I have from my '94 C1500 donor and to my surprise they are standard 3/16" inverted flare. |
Re: Disc Brake Upgrade Reference Thread
Thanks. Just goes to show its a gamble whether GM used metric or US in the 80-90s. :waah:
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Re: Disc Brake Upgrade Reference Thread
well i just picked up some 5 lug spindles today at half off price today at picknpull the spindles are from a 73 chevy what other parts do i need to make my 8 lug 65 c1500 gmc to 5 lug disc brake
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Re: Disc Brake Upgrade Reference Thread
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Re: Disc Brake Upgrade Reference Thread
Scot pretty much covered it.
You won't need the special tie rod adapters if you change the complete steering linkage for the '73-'87 assembly. There is another possibility on that, but I haven't been able to confirm yet that it will actually work. I don't know for sure just what lower ball joints you will need to use, as I haven't done the swap quite like you're doing. The ball joint hole in the lower control arm is larger than the C10 ball joints. And you can't just change the lower control arm for the C10 unit since they mount differently. You may have to try a few different lower ball joints to find what will work. You might get lucky and the '63-'70 lower ball joint may work with the '73-'87 spindle. That is why I mentioned earlier about using the '88-'98 spindle, since I know what works to do the conversion that way. Let us know what you find to work. Quote:
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Re: Disc Brake Upgrade Reference Thread
then it would of been best to just find some 88-98 spindles or am i still ok with the 73's i got today, just have to try diffrent lower ball joint to see the best fitment.
also i would like some more info on tie rods part i just got done with school and learning collision repair so dont really know the mechaincal repair yet thats why im here to learn from u peeps |
Re: Disc Brake Upgrade Reference Thread
Here is one of my other posts on the subject of tie rods. However I don't know just what size your original C20 inner tie rods are as compared to the C10 inner tie rods. I wouldn't give up on the '73 spindles just yet....see if they will work with the '63-'70 lower ball joints first.
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Re: Disc Brake Upgrade Reference Thread
are the upper and lower control arm interchangeable with frame and crossmember if so i migth just go and look for some this weekend
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Re: Disc Brake Upgrade Reference Thread
I'm not quite sure what you mean.
As I mentioned in post #132 above, you can't just switch the lower control arms. This is because the '63-'66 C20's have a flat lower control arm shaft that bolts directly to the crossmember. The C10's from '63-'87 and the C20's from '67-'87 both use round control arm shafts that sit in a saddle that is riveted to the crossmember and attached with U-bolts. Without making it difficult, you will have to change the front suspension crossmember if you want to use the C10 lower control arms. A last minute thought here, you might be able to switch the control arm shafts from your C20 arms to a set of '63-'70 lower control arms. I'm not sure if the bushings are the same or not. If you decide to try this, be forewarned, changing the control arm shafts and the steel bushings can be a big pita unless you have the proper tools to do it.....even then. Quote:
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Re: Disc Brake Upgrade Reference Thread
i see what your saying the only way it would work is if i would switch crossmembers this will be the only way to remove the c20 lower arms and switch them to the correct c10 arms that would bolt rigth in. So in this case let say i did switch the cross member to a later model would i have any problem with the engine mounts as i tend to keep my stock 305.
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Re: Disc Brake Upgrade Reference Thread
I'm assuming you are referring to the 305 V6? I don't think you'll have any issues with using your existing engine mounts with the later model crossmember. As far as I know the later model cross members have the lower motor mount bracket holes in the same location.
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Re: Disc Brake Upgrade Reference Thread
i think im ganna switch crossmember to make this a easy brake build oh yea its the 305 v6
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Re: Disc Brake Upgrade Reference Thread
Ok, sorry I am sure this has been talked about somewhere in here but I couldn’t find it. Anyway I have a 66 short fleet, and I bought a 76 short step side to part out for my truck. I am really unsure what I want to do. Kinda wanna keep it 6 lug because I like my wheels and used 6 lug wheel are much easier to find. So what could I do to the 76 ft end to make it 6 lug? But if I go 5 lug anything weird with putting the 76 rear end in my truck. Sorry for the dumb questions. LOL
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Re: Disc Brake Upgrade Reference Thread
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6 lug rotors are available from CPP, Performance Online, and several other vendors. This is an aftermarket part that is a direct swap for the 5 lug. If your 66 has rear coil springs you can get a kit which contains weld-on brackets for the trailing arms and panhard bar. If you want 6 lug shafts for the 76 rear, you can use stock shafts for a 71-87 4WD. Your 66 shafts are too short for the 76 rear. Ray |
Re: Disc Brake Upgrade Reference Thread
Welcome to the forum and hello neighbor :)
raycow pretty much covered it. Let me know if you need a power steering box adapter or any of my other parts I make. No shipping since you can just come pick them up. Quote:
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Re: Disc Brake Upgrade Reference Thread
LOL.... Thats funny. I was actually checking out your stuff but didnt look that you were in CDA. Ill post up a deal bout my truck. I got too many ideas and dont know what to do. LOL BTW, thanks for the help guys. If that 76 rear end is wider maybe Ill just keep mine, and keep it 6 lug.
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Re: Disc Brake Upgrade Reference Thread
what also a good 5 lug rear end axle that would bolt in with my shaft im not quit sure if it has spring i think it has leaf spring for sure though
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Re: Disc Brake Upgrade Reference Thread
I've got a slightly different question for you guys that have done this swap already. After the swap is done, how is the ride height for a full '73-'87 crossmember and control arms in comparrison to the original '63-'66 front end? Does the truck sit any higher or lower? Mostly I am just curious in a stock for stock contrast. Thanks
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Re: Disc Brake Upgrade Reference Thread
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If the coil springs are the same, I mean the original ones were for a V8 and the swapped in ones were from a V8 truck (or 6 cyl/6cyl) the heights should be close not counting any amount of settling in the spring... |
Re: Disc Brake Upgrade Reference Thread
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Re: Disc Brake Upgrade Reference Thread
Those little 'Y' spacers sound like the shims for the upper control arms. Those are used between the upper control arm shaft and the part of the crossmember against the side of the frame. The shims are added or removed during the front end alignment process to adjust the caster and camber of the front wheels. There's really no way of knowing how many and what thickness to put where without doing a front end alignment. Yes you can bolt the '76 C10 control arms to your '66 GMC front suspension crossmember. As long as it isn't a 3/4 ton. I would recommend upgrading to the larger '76 U-bolts used on the lower control arm shaft. You will need to drill out the holes in the crossmember to do so.
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Re: Disc Brake Upgrade Reference Thread
what should i do with the shims i mean can i just put them on how ever for now till its time to get a front end alignment
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Re: Disc Brake Upgrade Reference Thread
I would just keep track of the shims that are on your GMC right now. When you put the '76 control arms on, use the same shims that were on your truck to start with and in the same places. That will get you close enough to get your truck to an alignment shop.
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Re: Disc Brake Upgrade Reference Thread
Have a '70 C30, am picking up a complete running '81 C30 donor truck. Had planned on doing complete crossmember swap but it has been suggested that I just swap parts onto existing cross member, donor has low milage, late '80's 454 that will be part of the swap, plan to install drop spindles on at same time. I would imagine that most of what has been referenced concerning C10's would relate across the board to the C30. Just wondering if I should remove the complete donor crossmember, rebuild it as needed w/dropped spindles and swap out crossmembers or start w/existing crossmember in '70 and swap parts from '81 ? Thanks in advance.
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Re: Disc Brake Upgrade Reference Thread
I don't remember for sure on a '70 C30 if the lower control arm shafts are round or flat like the '63-'66's. If they are round there is no reason you can't swap everything from the '81 including the control arms. I would suggest going with the lower control arm shaft U-bolts from the '81. I believe they are a little bigger than the '70 pieces.
If the LCA shafts on the '70 are flat, you'll have to either keep the '70 LCA's or swap the entire crossmember |
Re: Disc Brake Upgrade Reference Thread
Thanks, will check that out.
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Re: Disc Brake Upgrade Reference Thread
oops,
I figured it'd be better to just start a new thread: http://67-72chevytrucks.com/vboard/s...92#post4308992 |
Re: Disc Brake Upgrade Reference Thread
Hey Guys - hope its cool to post in this FAQ still - Sorry if these questions were answered - I missed if they were.
will 80-87 3/4 ton or 1 ton trucks work for the conversions? What about 73-87 c20's also? As long as theyre 2wd? im assuming they would have the 1-1/4 rotors instead of light duty, right? Im looking to swap to my 64 c10 6 lug - and keep 6 lug - i see the parts store call out for them (thanks) in one of the thread posts a side question - ive got drop coils in my stock arms now - could I resue them? or are the 73-87 coils different for some reason? Can you run drop coils AND spindles? Sean |
Re: Disc Brake Upgrade Reference Thread
The C20's and C30's prior to '88 are going to have the 8 x 6.5" wheel bolt pattern. Those parts will certainly work if you wanted the 8 x 6.5" bolt pattern.
There are 2 ways to have 6 x 5.5 front disc brakes. one is to use the factory light duty '88-'98 C2500 parts as listed earlier in this thread. Or you can use the typical '71-'87 C10 front suspension parts and then purchase the aftermarket 6 x 5.5" rotors for those spindles. As for the springs, I believe the '73-'87 springs are a little different, but I think the early ones will work. And yes you can run both drop spindles and drop springs at the same time......many guys do to get their desired amont of drop. Quote:
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Re: Disc Brake Upgrade Reference Thread
thanks cap'n - could I use the c20/c30 a-arms, steering components, sway bar and brake parts with aftermarket drop spindles and rotors (5 or 6)?
theres quite a few 3/4 and 1 tons as parts trucks right now in the area here for cheap id be sourcing drop spindles anyway even if i went with a 73-87 c10 - any diff in a-arms between c10,20,and 30s in the 73-87 yrs? i have 6 lug wheels now, but i also have 5 lug rotors and calipers from another project so Im not sure really if i want to do 5 or 6 |
Re: Disc Brake Upgrade Reference Thread
The C20 and C30 control arms use the steel bushings just like the '63-'72 C10's did. The main issue with using the C20 or C30 control arms, is the lower ball joints are bigger than the C10's. There's really nothing to gain by swapping your '64's control arms for the C20 or C30 arms unless you want to use the '88-'98 LD C2500 parts. This would give you 6 lug front discs
If you're having trouble locating the '73-'87 C10 control arms, I would just keep your original arms. Then just buy your drop spindles, and which ever rotors you decide on. The steering boxes are the same whether from a C10,C20 or C30. However I don't know if the steering linkage will be the same. It is doubtful. The C20 or C30 sway bars will work on your truck. Often times you will find the larger 1- 3/16" bar. |
Re: Disc Brake Upgrade Reference Thread
thats what i was looking for - ill keep looking for 73-87 c10! thanks again as always capt!
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Re: Disc Brake Upgrade Reference Thread
My dad just did this swap on a 64 c20 w 75 c20 parts. He wanted to keep the 8lug because he had nice wheels on the truck. He had to swap the whole xmember becaused the control arms didn't match up. Also, we found that using the 75 motor mounts pushed the engine about 2 inches forward of where it was originally. Other than that it was the easiest and most problem free part of the build.
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