67-70 rear end swap in to a 55 2nd series - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hb32 · 08-15-2011, 10:17 PM

Not having much luck with the search option and looking for info on swapping a 67-70 1/2 ton 2wd rear into my 55. From my research it looks like the 67-70 is less then an inch narrower and the spring perches are in a different location. Anybody document or have pictures of this swap? I was hoping for 3:08`s and I have a 235 with a stock 4 speed which I was planning on leaving in place.

**CHIZZLER** · 08-15-2011, 10:49 PM

check out leevons build.project popeye.

**mr48chev** · 08-15-2011, 11:16 PM

You might want to look for a GMC rear end as they usually have leaf springs and that will make things easier unless you intend to run the truck bars and coils.

hb32 · 08-15-2011, 11:21 PM

Quote:

Originally Posted by mr48chev

You might want to look for a GMC rear end as they usually have leaf springs and that will make things easier unless you intend to run the truck bars and coils.

Did not know that. Same for the GMC 67-70 for 6 bolt?

tmoble · 08-16-2011, 01:59 AM

your 235 is going to be a real dog with a 3.08. You know that, right? there's reasons why they came with 3.90s and 4.11s.

hb32 · 08-16-2011, 11:19 AM

Quote:

Originally Posted by tmoble

your 235 is going to be a real dog with a 3.08. You know that, right? there's reasons why they came with 3.90s and 4.11s.

I am using the truck as a daily driver and right now it has a Dodge rear with 2;7?`s Great on the highway and in 4th really motors along. What would you suggest? It is too wide and have wheel scrub on the fenders.

hb32 · 08-17-2011, 09:21 PM

Am I the only one to think of this?

08-15-2011, 10:17 PM	#1
hb32 Registered User Join Date: Feb 2009 Location: Surrey B.C. Canada Posts: 255	67-70 rear end swap in to a 55 2nd series Not having much luck with the search option and looking for info on swapping a 67-70 1/2 ton 2wd rear into my 55. From my research it looks like the 67-70 is less then an inch narrower and the spring perches are in a different location. Anybody document or have pictures of this swap? I was hoping for 3:08`s and I have a 235 with a stock 4 speed which I was planning on leaving in place. __________________ Life is too short to drive a boring vehicle.

08-15-2011, 10:49 PM	#2
CHIZZLER SAVING ONE TRUCK AT A TIME Join Date: Feb 2010 Location: sherwood oregon Posts: 1,141	Re: 67-70 rear end swap in to a 55 2nd series check out leevons build.project popeye. __________________ 53-suburban (99% done) 40-pick up (99.9% done) 12-cc lb dually D-max (dd) 61-crew cab D-max "PAY LESS FOR WHAT YOU NEED PAY MORE FOR WHAT YOU WANT" 53 BURBAN BARN FIND:http://67-72chevytrucks.com/vboard/s...d.php?t=404091 1940 PROJECT MOON SHINE:http://67-72chevytrucks.com/vboard/s...d.php?t=551088 1961 CREW MAX: http://67-72chevytrucks.com/vboard/s....php?p=6957999

08-15-2011, 11:16 PM	#3
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,731	Re: 67-70 rear end swap in to a 55 2nd series You might want to look for a GMC rear end as they usually have leaf springs and that will make things easier unless you intend to run the truck bars and coils.

08-16-2011, 01:59 AM	#5
tmoble Registered User Join Date: Feb 2009 Location: Glendale, Az Posts: 1,062	Re: 67-70 rear end swap in to a 55 2nd series your 235 is going to be a real dog with a 3.08. You know that, right? there's reasons why they came with 3.90s and 4.11s.

08-17-2011, 09:21 PM	#7
hb32 Registered User Join Date: Feb 2009 Location: Surrey B.C. Canada Posts: 255	Re: 67-70 rear end swap in to a 55 2nd series Am I the only one to think of this? __________________ Life is too short to drive a boring vehicle.

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