disk brake kits - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76bonanza · 12-11-2005, 04:32 PM

Most of the disk brake kits for 6 lug always say may not work with factory wheels. I dont know if I have factory wheels or not I think they are 15x8 rallyes. Anyway what is the deal?

Longhorn Man · 12-11-2005, 05:07 PM

If they are rally wheels, they aren't original.

76bonanza · 12-11-2005, 05:11 PM

So I should be ok with the kits that say they will not fit factory drum wheels?
What rims came on our trucks?

Longhorn Man · 12-11-2005, 05:22 PM

Those wheels should work fine, they woulda come off a 4X4 73 - 87 truck or blazer. Our trucks came with plain old steel wheels

**dennislbrooks** · 12-11-2005, 06:27 PM

Most likely they would need at least a 1" spacer as I did on my friends 66. His oem wheels are built a little different and the 72 caliper actually touched the rim without the spacer.

76bonanza · 12-11-2005, 06:44 PM

your friend had rallye rims? that is what is on mine.

Tx Firefighter · 12-11-2005, 06:47 PM

The 6 lug Rally wheels should clear the brake calipers. They only came on later trucks, which had discs from the factory.

Some stock 6 lug wheels were constructed queer and had interference with disc brake calipers when the trucks were converted to discs. That was only wheels off stock early drum brake trucks.

**dennislbrooks** · 12-11-2005, 06:50 PM

Yep --TX Firefighter said it. No they were not ralley rims.

Scottb · 12-12-2005, 02:29 AM

i took the control arms (complete with everything) off an 81 chevy 3/4 ton (i have a 3/4 ton) and i found out in a bad way that 15" wheels dont fit over the calipers... so i had to search around the town like mad to find 2 16" 8 bolt wheels with tires on em for less than 50 bucks- finally found some too... then i got to test drive it back to reno from placerville- wow disks are a huge upgrade!!! that's prolly why they say may not work with factory wheels- 15's dont fit...

krue · 12-12-2005, 02:52 AM

I put stock truck wheels off my 70 onto the front of my 72 blazer 4wd and the wheel caught on the caliper. Put a rally on there and had no more troubles.

byrd · 12-12-2005, 08:06 AM

I have got 15x8 corvette style rally's will they work with this kit or will I have interference? Is there a difference between the truck style and corvette syle rallys, other than the looks? Randy

Tx Firefighter · 12-12-2005, 08:12 AM

The problem was with some OEM 6 lug wheels that were stock on these trucks with drum brakes. Aftermarket wheels like the Vette rallys don't have the problem or even the OEM 4x4 6 lug rally wheels.

76bonanza · 12-12-2005, 02:01 PM

part two, what all do ,I have to change out, some kits have alot of stuff some a little? I have a booster and MC on there already the proportioning valve I Know has to be changed to a disk drum. But what about the booster and MC? Then under the truck I know spindle calipers hoses and such but some of the kits come with ball joints and tie rods and such. I dont mind spending on brakeing but dont want to flush money either.

Thanks

yank · 12-12-2005, 02:19 PM

I got the 6 lug conversion kit from GMCPauls. It's like $470. You will need to get a MC for an 71 or newer (resevior is larger) and the disc/drum proportioning valve. The kit that GMCPaul sells uses the original tie rod ends off your '68. The tie rod ends and spindles on the 71 and up I believe are a different diameter.

76bonanza · 12-12-2005, 03:17 PM

on the mc I know mine is not stock but dont know how to tell what it will work with it is the dual bail style i do know that much.

12-11-2005, 04:32 PM	#1
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	disk brake kits Most of the disk brake kits for 6 lug always say may not work with factory wheels. I dont know if I have factory wheels or not I think they are 15x8 rallyes. Anyway what is the deal? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-11-2005, 05:07 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: disk brake kits If they are rally wheels, they aren't original.

12-11-2005, 05:11 PM	#3
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: disk brake kits So I should be ok with the kits that say they will not fit factory drum wheels? What rims came on our trucks? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-11-2005, 05:22 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: disk brake kits Those wheels should work fine, they woulda come off a 4X4 73 - 87 truck or blazer. Our trucks came with plain old steel wheels

12-11-2005, 06:27 PM	#5
dennislbrooks Registered User Join Date: Feb 2004 Location: Williamsburg, Ohio Posts: 1,807	Re: disk brake kits Most likely they would need at least a 1" spacer as I did on my friends 66. His oem wheels are built a little different and the 72 caliper actually touched the rim without the spacer.

12-11-2005, 06:44 PM	#6
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: disk brake kits your friend had rallye rims? that is what is on mine. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-11-2005, 06:47 PM	#7
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: disk brake kits The 6 lug Rally wheels should clear the brake calipers. They only came on later trucks, which had discs from the factory. Some stock 6 lug wheels were constructed queer and had interference with disc brake calipers when the trucks were converted to discs. That was only wheels off stock early drum brake trucks. __________________ I'm on the Instagram- @Gearhead_Kevin Last edited by Tx Firefighter; 12-11-2005 at 06:47 PM.

12-11-2005, 06:50 PM	#8
dennislbrooks Registered User Join Date: Feb 2004 Location: Williamsburg, Ohio Posts: 1,807	Re: disk brake kits Yep --TX Firefighter said it. No they were not ralley rims.

12-12-2005, 02:29 AM	#9
Scottb Registered User Join Date: Oct 2005 Location: Reno, NV Posts: 17	Re: disk brake kits i took the control arms (complete with everything) off an 81 chevy 3/4 ton (i have a 3/4 ton) and i found out in a bad way that 15" wheels dont fit over the calipers... so i had to search around the town like mad to find 2 16" 8 bolt wheels with tires on em for less than 50 bucks- finally found some too... then i got to test drive it back to reno from placerville- wow disks are a huge upgrade!!! that's prolly why they say may not work with factory wheels- 15's dont fit... __________________ 70 GMC C2500 BB 402, LSD Dana 60 rear, Converted to SM 465, Holley 750, Edelbrock Performer RPM air-gap intake, Flowtech Headers, 2.5" Flomaster Exhaust, HEI ignition, 81 Chevy disk Brakes. All work done by myself. last 1/4 mile (almost 3 years ago) 15.9 @ 86

12-12-2005, 02:52 AM	#10
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Re: disk brake kits I put stock truck wheels off my 70 onto the front of my 72 blazer 4wd and the wheel caught on the caliper. Put a rally on there and had no more troubles. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

12-12-2005, 08:12 AM	#12
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: disk brake kits The problem was with some OEM 6 lug wheels that were stock on these trucks with drum brakes. Aftermarket wheels like the Vette rallys don't have the problem or even the OEM 4x4 6 lug rally wheels. __________________ I'm on the Instagram- @Gearhead_Kevin Last edited by Tx Firefighter; 12-12-2005 at 08:13 AM.

12-12-2005, 02:01 PM	#13
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: disk brake kits part two, what all do ,I have to change out, some kits have alot of stuff some a little? I have a booster and MC on there already the proportioning valve I Know has to be changed to a disk drum. But what about the booster and MC? Then under the truck I know spindle calipers hoses and such but some of the kits come with ball joints and tie rods and such. I dont mind spending on brakeing but dont want to flush money either. Thanks __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-12-2005, 02:19 PM	#14
yank Registered User Join Date: Jan 2001 Location: Meridian, Ms. Posts: 244	Re: disk brake kits I got the 6 lug conversion kit from GMCPauls. It's like $470. You will need to get a MC for an 71 or newer (resevior is larger) and the disc/drum proportioning valve. The kit that GMCPaul sells uses the original tie rod ends off your '68. The tie rod ends and spindles on the 71 and up I believe are a different diameter. __________________ 70 C/10 SWB Go ahead chance it........Columbus did!!! Steve (Chitlin) Bacon My DIY Shop http://s24.photobucket.com/albums/c47/mpalmiter/shop/

12-12-2005, 03:17 PM	#15
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: disk brake kits on the mc I know mine is not stock but dont know how to tell what it will work with it is the dual bail style i do know that much. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO



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