Need help going back to 6lug

[The Big Green]

I have a 67 with the 5 lug disc conversion and a 71-72 rearend. I want to convert to 6 lug front and rear. I forgot where the rotors for 6x5.5 where found for $89 piece? I have a couple axles from a 85 K5, would they work?

[tucnnuts]

hey big green..i have converted mine using the 90 models 3/4 ton disc brakes spindles and brakes, lower ball joint and upper, used 71 72 3/4 lower a arms(yours may work ,not sure) on the rear i used 68 six lug rear axles and drilled them to match the front stud size....

[The Big Green]

Mines bagged on new Belltech spindles and new balljoints, my lower arms are cut for the bags and upper is tilted to align the balljoint when lowered. I'd have to do a straight rotor swap.

[lolife99]

ECE, CPP, PerformanceOnLine, all sell the rotors you need.

[GMCPaul]

We currently have a Sale on the 6 lug 12" rotor & hub assemblies for $165.00 a pair + shipping of $39.50 in the continential USA. They are part# 6541035 and can be found on the following page of our web site
http://www.gmcpauls.com/SALE_SPECIALS.htm
Wish I could help on the axle lengths but we only have that data for 1947-78 trucks.
GMCPaul Jr.

[The Big Green]

Stock 71-72 rotor being 11in? Easily work with my Belltech 3in spindles? I may get a couple things, I need carpet too lol. I have a 2.5in raised tranny tunnel though.

[GMCPaul]

Stock rotors are 12", we mention that ours are a 12" rotor because some suppliers such as CPP and others offer a disc conversion kit that uses a car rotor that are 10.5"-11" and normally these use a 5 X 4 3/4" bolt pattern or a 5on5" bolt pattern. Our rotors will work with the Bell tech drop spindles.
By raised tranny tunnel do you mean you have a high hump? or are you saying its raised a additional 2.5" over stock height tunnel. If its raised higher than a stock tunnel you will not be able to use a molded carpet set, if its a high hump bolt in tunnel that you installed in a low hump truck you just need to order a carpet for the high hump trucks.
GMCPaul Jr.

[Hottrucks]

the rotor from a 1992 2500 with a GVW under 7300lbs is a direct bolt on with the 6 lug your looking for..they use the same bearings, race and seals too...I ran into the same issue with my western spindles..

as far as your rear axle since you have a 67 your going to need to find a pre 70 axle..after 70 they got a bit wider.....not sure if you care or not but since the disc convertion widened your front stance you may want the wider axle??? I guess the type of wheels you are going to run wil make a big diff

[The Big Green]

Originally Posted by Hottrucks

the rotor from a 1992 2500 with a GVW under 7300lbs is a direct bolt on with the 6 lug your looking for..they use the same bearings, race and seals too...I ran into the same issue with my western spindles..

as far as your rear axle since you have a 67 your going to need to find a pre 70 axle..after 70 they got a bit wider.....not sure if you care or not but since the disc convertion widened your front stance you may want the wider axle??? I guess the type of wheels you are going to run wil make a big diff

I have the wider 71-72 5x5 rear. Same for the front except 73-87.

[The Big Green]

Originally Posted by GMCPaul

Stock rotors are 12", we mention that ours are a 12" rotor because some suppliers such as CPP and others offer a disc conversion kit that uses a car rotor that are 10.5"-11" and normally these use a 5 X 4 3/4" bolt pattern or a 5on5" bolt pattern. Our rotors will work with the Bell tech drop spindles.
By raised tranny tunnel do you mean you have a high hump? or are you saying its raised a additional 2.5" over stock height tunnel. If its raised higher than a stock tunnel you will not be able to use a molded carpet set, if its a high hump bolt in tunnel that you installed in a low hump truck you just need to order a carpet for the high hump trucks.
GMCPaul Jr.

I have the low hump that's raised for the 2.5in Z so the tranny floors raised up.

[Hottrucks]

you maybe able to find a 70 6 lug axle and drums...I think???? they are the same

[71tahoe]

Originally Posted by Hottrucks

the rotor from a 1992 2500 with a GVW under 7300lbs is a direct bolt on with the 6 lug your looking for..they use the same bearings, race and seals too...I ran into the same issue with my western spindles..

This one?

http://www.rockauto.com/catalog/moreinfo.php?pk=391026

Says it's smaller than 12" unless 12 is a nominal measurement. Does it work well with 71-72 calipers and pads?

[The Big Green]

Originally Posted by 71tahoe

This one?

http://www.rockauto.com/catalog/moreinfo.php?pk=391026

Says it's smaller than 12" unless 12 is a nominal measurement. Does it work well with 71-72 calipers and pads?

Also if it's correct and direct swap then this is a rotor that can be bought local?That would be a huge plus!

[Hottrucks]

I can't conferm on the 71/72 spindles...I would love to know myself ..I do KNOW FOR SURE it will fit the western drop spindle which use the 73/87 spildles...what I can tel you is ask for the bearing seal # for both the 71/72 and the one above but I'm guessing your ging to find they are diff...I have a great parts guy at my local NAPA to loves little projects like this..I drop off the parts and he makes them fit...keep in mine he can read a bok most of the info won't be found by clicking away on a putr....

[lolife99]

Originally Posted by Hottrucks

I can't conferm on the 71/72 spindles...I would love to know myself ..I do KNOW FOR SURE it will fit the western drop spindle which use the 73/87 spildles...what I can tel you is ask for the bearing seal # for both the 71/72 and the one above but I'm guessing your ging to find they are diff...I have a great parts guy at my local NAPA to loves little projects like this..I drop off the parts and he makes them fit...keep in mine he can read a bok most of the info won't be found by clicking away on a putr....

Have you actually ran this application on a truck,... or did you just take a spindle into the parts store and try the rotor for fit?

I was thinking there was a problem using this 88-98 LD 2500 series rotor on the 73-87 spindles, because the caliper wouldn't bolt on.
Can you confirm this?

The 71-72 spindles take the same bearings and seals as the 73-80 HD 1.25" wide rotors.

[lolife99]

Per O'Reilly Automotive website,... The 5 lug rotor is .400" taller (longer hub),than the LD 2500 rotor.
(4.910" compared to 4.510")

Just curious to know if this will work also.

[Hottrucks]

I havn't put the spindles on yet but we dry fit everything at the store composed a list and its on file with them....this way I can call them up and they will get all the parts the next day for me ( I pre plan my builds so that the truck is only down for short times)..I'm trying to save every penny for the swap first (and not doing very well F'n bills) since my truck is bagged with cupped lowers doing the swap is going to take some time and some more fab work to get some inner fenders. I have to cut somemore of the fender support and hindge, so since I don't know how the motor is going to set I don't want to build them twice.. my hole truck build is on hold till the swap and its killing me.......

[The Big Green]

I found rotors on a website posted by someone that has a pair for $130, not too bad, the slotted drilled ones were $220. These will be a while out but I don't want to buy a local 90ish 2500 rotor and it not fit.


Anyone know what rear axles for 6 lug would be a swap in a 72 rearend? 85 K5 maybe? They are 6 lug and I though people have said 73-87 1/2 ton would work?

[lolife99]

Originally Posted by Hottrucks

I havn't put the spindles on yet but we dry fit everything at the store composed a list and its on file with them....this way I can call them up and they will get all the parts the next day for me ( I pre plan my builds so that the truck is only down for short times)..I'm trying to save every penny for the swap first (and not doing very well F'n bills) since my truck is bagged with cupped lowers doing the swap is going to take some time and some more fab work to get some inner fenders. I have to cut somemore of the fender support and hindge, so since I don't know how the motor is going to set I don't want to build them twice.. my hole truck build is on hold till the swap and its killing me.......

Just to clarify,... Did you try to install a brake caliper on the 73-87 spindle with the 90's rotor?

I'm all for saving money,... but I wonder why ECE and CPP, and other comapnies would spend the cash to tool up blank rotors and drill them for 6-lug, if there was a rotor that would fit off the shelf?

[Hottrucks]

Originally Posted by lolife99

Just to clarify,... Did you try to install a brake caliper on the 73-87 spindle with the 90's rotor?

I'm all for saving money,... but I wonder why ECE and CPP, and other comapnies would spend the cash to tool up blank rotors and drill them for 6-lug, if there was a rotor that would fit off the shelf?

yes the 92 rotor on a Western drop spindle with 73/87 caliper

Alot of companies DO NOT make ther parts they are out souced or may not be intended for this a particular application...Just because a 140 amp caddy alt is designed for a caddy doesn't mean you cant fit it with a different pully and use it for other applications...kinda like buying a firebird fender and putting it on your camaro or a ranger fender that fits your mazda pick up??

this goes back years...MANY car manufactures used Ford parts ( like steering boxes,axles,brakes) because Ford was mass producing them and they couldn't tool up to build them for what he was selling them for. Kinda like store bands today..you don't think wally world is growing green beans do you..

History 101 Henrey Ford got together with all the car builders back in the day and wanted to have just 1 oil filter size 1 tire size and other consumables to help keep costs down by mass producing these...since he was the only one with the finaces to support this idea (and profit from it) so they declined his Idea....think how simple things could be!!

[lolife99]

Originally Posted by Hottrucks

yes the 92 rotor on a Western drop spindle with 73/87 caliper

Thanks for the reply,...

[lolife99]

OK,... I'm really not trying to start anything.
But there's alot of confusion about the 88-98 LD 2500 series 6-lug rotors.

I found this great thread:
http://67-72chevytrucks.com/vboard/s...=367260&page=4

Here's a quote from the man himself,... Captainfab:
That is correct the '71-'87 C10's were not available from the factory with 6 lugs. If you want 6 lugs and disc brakes, you can either do the conversion with the '88-'98 OEM parts, or you can buy aftermarket 6 lug rotors for the '71-'87 spindles from suppliers such as CPP, ECE, etc.

Yes the '88-'98 6 lug rotors do use the same bearings, and they do technically fit the '71-'87 spindles, but they don't line up with the calipers. So yes if you want to use those rotors, you will have to use the '88-'98 1500 or LD 2500 spindles and related parts. This also requires you to change the LCA to a C20 LCA.

Otherwise, if you're going to use the '71-'87 spindles, you will have to buy the aftermarket 6 lug rotors as Russ65C10 stated

[Hottrucks]

I read that too??? like I said I have not tried it on the stock spindles only the Western...

I dont have access to any stock disc brake set ups to play with ....I wounder if you could use tha later model calipers too??

but I'm sticking to my guns about ALOT of after market stuff being stock for other things

[raycow]

Originally Posted by The Big Green

Anyone know what rear axles for 6 lug would be a swap in a 72 rearend? 85 K5 maybe? They are 6 lug and I though people have said 73-87 1/2 ton would work?

Shafts from a 71-up 4WD 12 bolt will work. I don't know if the splines are the same on a 10 bolt shaft.

Ray