Rear End for 72 Coil Spring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GBJ · 10-06-2016, 03:21 PM

New here and I must say it's a great forum. I picked up a 72 SWB back in May out of Arizona. Beautiful will built frame off 3 yes ago, 5.3 Vortec / 4L60E swap but they put a 99 Z28 rear end in it. I'm looking to either beef up the 5.3 or maybe an LS3. That little 7.5 differential won't handle much, not planning on racing it but do like a few burn outs. The current differential is 62" axle flange to axle flange. I want to minimize my work and keep same rims. I keep finding mixed info on what year models have that rear end deminsion or at least within an inch with disc brakes. Any help would be appreciated.

George

LongBox · 10-06-2016, 04:30 PM

Beautiful truck, so clean, and yet nicely re-done. Welcome to the forum, and sorry that I'm not able to answer your question.

AnotherWs6 · 10-06-2016, 04:39 PM

Yes welcome. I'm no help with dims either but you are right - that 7.5 should probably go BUT, there are a lot of guys running hi powered 4th gen F-bodys who still have the stock rear. You have two things going for you - you're automatic and your never going to get a ton of traction with low-pro street tires. That rear could live a long and happy life.

bsampson · 10-06-2016, 04:50 PM

Welcome, and I agree, very nice truck!!

So if it has a '99 Camaro rear end, does it have the 5x4.75" bolt pattern, and that pattern is what you want to keep?

GBJ · 10-07-2016, 01:02 PM

Thanks for the complements I got real lucky on finding this one. Yes I plan on keeping the 4 3/4" pattern. The Coy rims and Nitto tires only had 1000 miles on them and they ain't cheap. I had a friend back in the day run one of those rear ends into the ground with decent hook up. I'm going to stay with it for now but want to get something built in case it let's go. My race day's are long over just want a little thump and sling some rubber every now and then.

Thanks again and hope anyone on the east coast is safe, I live on the TX / LA border on the coast and deal with hurricanes more than I want. Everyone have a good weekend.

10-06-2016, 03:21 PM	#1
GBJ Registered User Join Date: Apr 2016 Location: Groves TX Posts: 15	Rear End for 72 Coil Spring New here and I must say it's a great forum. I picked up a 72 SWB back in May out of Arizona. Beautiful will built frame off 3 yes ago, 5.3 Vortec / 4L60E swap but they put a 99 Z28 rear end in it. I'm looking to either beef up the 5.3 or maybe an LS3. That little 7.5 differential won't handle much, not planning on racing it but do like a few burn outs. The current differential is 62" axle flange to axle flange. I want to minimize my work and keep same rims. I keep finding mixed info on what year models have that rear end deminsion or at least within an inch with disc brakes. Any help would be appreciated. George Attached Images Last edited by GBJ; 10-06-2016 at 03:22 PM. Reason: wording

10-06-2016, 04:30 PM	#2
LongBox Registered User Join Date: Sep 2016 Location: Vancouver BC Posts: 784	Re: Rear End for 72 Coil Spring Beautiful truck, so clean, and yet nicely re-done. Welcome to the forum, and sorry that I'm not able to answer your question. __________________ Rick -69 GMC 910 Long Box, 350 -98 Chev Silverado 1500, 350 Vortec 4L60e -08 Mustang GT Convertible

10-06-2016, 04:39 PM	#3
AnotherWs6 Registered User Join Date: Feb 2016 Location: Westchester, NY Posts: 602	Re: Rear End for 72 Coil Spring Yes welcome. I'm no help with dims either but you are right - that 7.5 should probably go BUT, there are a lot of guys running hi powered 4th gen F-bodys who still have the stock rear. You have two things going for you - you're automatic and your never going to get a ton of traction with low-pro street tires. That rear could live a long and happy life. __________________ 1968 C-10 Suburban - Original 396/TH400 2002 Transam WS6 - M6 - Black/Black - Evil Garage Queen 2000 Silverado - DD - Small lift+Body lift+35" Duratracs+4.88's + Eaton TruTrac - Monster Truck 2010 Cadillac CTS Wagon Sport - Wife's DD and the only classy car we have.

10-06-2016, 04:50 PM	#4
bsampson Registered User Join Date: Jul 2012 Location: Central IL Posts: 63	Re: Rear End for 72 Coil Spring Welcome, and I agree, very nice truck!! So if it has a '99 Camaro rear end, does it have the 5x4.75" bolt pattern, and that pattern is what you want to keep?

10-07-2016, 01:02 PM	#5
GBJ Registered User Join Date: Apr 2016 Location: Groves TX Posts: 15	Re: Rear End for 72 Coil Spring Thanks for the complements I got real lucky on finding this one. Yes I plan on keeping the 4 3/4" pattern. The Coy rims and Nitto tires only had 1000 miles on them and they ain't cheap. I had a friend back in the day run one of those rear ends into the ground with decent hook up. I'm going to stay with it for now but want to get something built in case it let's go. My race day's are long over just want a little thump and sling some rubber every now and then. Thanks again and hope anyone on the east coast is safe, I live on the TX / LA border on the coast and deal with hurricanes more than I want. Everyone have a good weekend. Attached Images



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