Differential Help

74 Omega · February 2nd, 2008, 07:35 AM

I am looking to buy a rear end from a 71 Z28 (4.11's and posi). I would like to install it in a 74 Omega. The seller state that it is 54" backing plate to backing plate. Mine looks to be 54" also. My quetion is will this bolt right in? Are the leafs springs in the same location? What other problems I am missing? Any help would be great. Thanks

joe_padavano · February 2nd, 2008, 10:51 AM

Quote:

Originally Posted by 74 Omega

I am looking to buy a rear end from a 71 Z28 (4.11's and posi). I would like to install it in a 74 Omega. The seller state that it is 54" backing plate to backing plate. Mine looks to be 54" also. My quetion is will this bolt right in? Are the leafs springs in the same location? What other problems I am missing? Any help would be great. Thanks

The 68-74 X-body cars are actually based on the first gen F-body (67-69). The 75-79 X-body is based on the 70-81 F-body. This is a long way of saying it's unclear.

74 Omega · February 3rd, 2008, 07:18 AM

Thanks Joe,
does any one else have info?

J-(Chicago) · February 3rd, 2008, 10:35 AM

The measuring tape and caliper are the key tools here.

buzzbomb · February 5th, 2008, 11:10 AM

There is always a ton of rearends on e-bay for the leaf spring gm cars.

74 Omega · February 5th, 2008, 02:08 PM

I'm not lookin for one, I have all ready found one. It comes from a 71 camaro, I was just looking for info to see if it would fit right in or if I have to modify it.

gearheads78 · April 3rd, 2008, 04:00 PM

All that matters is that the spring perches are the same center to center. If that is the same it will bolt in. You might need different off set wheels though.

February 3rd, 2008, 10:35 AM	#4 (permalink)
J-(Chicago) Seasoned beater pilot. Join Date: Jan 2007 Location: Chicago Posts: 2,696	The measuring tape and caliper are the key tools here. __________________ I'd rather have a numbers matching poker hand.

April 3rd, 2008, 04:00 PM	#7 (permalink)
gearheads78 Super Moderator Join Date: Apr 2008 Location: Dallas TX Posts: 1,563	All that matters is that the spring perches are the same center to center. If that is the same it will bolt in. You might need different off set wheels though. __________________ -Richard 66 Cutlass ragtop my way Keep watching your cotton candy coated TV while your world falls apart around you...

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February 3rd, 2008, 07:18 AM	#3 (permalink)
74 Omega Registered User Join Date: Sep 2007 Location: New Hampshire Posts: 172	Thanks Joe, does any one else have info?

February 5th, 2008, 11:10 AM	#5 (permalink)
buzzbomb Registered User Join Date: Oct 2007 Posts: 32	There is always a ton of rearends on e-bay for the leaf spring gm cars.

February 5th, 2008, 02:08 PM	#6 (permalink)
74 Omega Registered User Join Date: Sep 2007 Location: New Hampshire Posts: 172	I'm not lookin for one, I have all ready found one. It comes from a 71 camaro, I was just looking for info to see if it would fit right in or if I have to modify it.