Wheels on a 70 GMC 1/2 ton - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Billy G · 08-01-2003, 01:45 PM

Does anyone know what size wheel lug pattern is on the 70 GMC 6 lug??? Truck is 1/2 ton swb step. Also, can the rear axles be changed to a 5-lug pattern without changing the whole rear unit?

Jason is looking, pricing, ect for new wheels, and we know we're going to upgrade to disc brakes in the front. What we dont know is whether to stay with the 6-lug on the disc conversion, or go ahead and switch everything to 5-lug. Which is the most efficient?

Seems just doing the 6-lug conversion would be more simple, but
we'd both appreciate your help and comments, and wanna say THANKS in advance.

Billy G

wnc mountain · 08-01-2003, 01:54 PM

I never can remeber the measurments but, you will have more options as far as rims if you switch to 5 lug. It is my understanding that you can swap out the axles from a 5 lug rear pretty easy, but I have never tried it. I'm sure someone will know for sure on all this.

Denny · 08-02-2003, 12:11 AM

Five lug axles are longer then the 6 lug axles so they would need to go to the machine shop to be shortened. I just did the Early Classics six lug disk conversion and I am real happy with it. The spindles and everything else were top quality. I would highy recommend Early Classics kit for the conversion. Disk brakes are the only way to go. My truck stops great now.

08-01-2003, 01:45 PM	#1
Billy G Registered User Join Date: May 2003 Location: Dayton, Tx (in Old River) Posts: 286	Wheels on a 70 GMC 1/2 ton Does anyone know what size wheel lug pattern is on the 70 GMC 6 lug??? Truck is 1/2 ton swb step. Also, can the rear axles be changed to a 5-lug pattern without changing the whole rear unit? Jason is looking, pricing, ect for new wheels, and we know we're going to upgrade to disc brakes in the front. What we dont know is whether to stay with the 6-lug on the disc conversion, or go ahead and switch everything to 5-lug. Which is the most efficient? Seems just doing the 6-lug conversion would be more simple, but we'd both appreciate your help and comments, and wanna say THANKS in advance. Billy G __________________ My FAMOUS LAST WORDS...."Ima Gonna!!" - 1970 GMC 1500 swb/step 250 I-6 3 spd - "The GEM" - 1976 Chev Scotsdale swb/step 350/350 - "The JEWEL" - 1982 Chev C-10 swb/step 250 I-6 3 spd - - 2001 Chev Silverado LT -

08-01-2003, 01:54 PM	#2
wnc mountain More hobbies than money! Join Date: Jan 2002 Location: Raleigh, nc, usa Posts: 655	I never can remeber the measurments but, you will have more options as far as rims if you switch to 5 lug. It is my understanding that you can swap out the axles from a 5 lug rear pretty easy, but I have never tried it. I'm sure someone will know for sure on all this. __________________ '70 cst10/swb 350, 3 on the tree, factory buckets. '70 GMC lwb 350/350 ps,pb '72 c-10 lwb 350/350 a/c, ps, pb '72 Blazer project

08-02-2003, 12:11 AM	#3
Denny Registered User Join Date: Jul 2002 Location: Cedar Hill, MO Posts: 426	Five lug axles are longer then the 6 lug axles so they would need to go to the machine shop to be shortened. I just did the Early Classics six lug disk conversion and I am real happy with it. The spindles and everything else were top quality. I would highy recommend Early Classics kit for the conversion. Disk brakes are the only way to go. My truck stops great now. __________________ 1969 Chevy C10. Dakota Digital Gauges, 383 Votex Engine, MSD 8361 Distributor, MSD 6A Unit, Demon Carb, Phoenix Transmission 4L80E trans, 3:73 Posi Rear End Early Classics 6 Lug Disc Brakes and Spindles All Stainless Lines

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