I have a rearend from a 80 firebird with a 2.41posi. I want to put it in my 69 camaro. I need to replace the spring mounts. Someone before me has replaced them before and I am not sure if they are in the right place. I am looking for the pinion angle and the measurement between the spring mounts. Can anyone help?
Thanks Bill  

Ugh! That's a tough one. Unless someone has the exact measurements, I'd suggest finding a competent rear end/driveline shop that can get the spring perches welded on right.

You other option is to find/borrow a '69 Camaro rear and put it next to the rear you've got and measure/compare between the two.  

I have a '68 Camaro. The 10 and 12 bolt rears have the same dimensions as far as spring mounting goes. Only 67-69 Camaro rears interchange as well as 68-74 Nova's, Apollo's, and Omega's. A rear from an 80's Camaro shouldn't fit unless the spring perches have been cut off and rewelded to fit the Gen 1 specs. The backing plate to backing plate dimension for a Gen 1 rear is 53" and if you measure from the inside edge of the spring perch where the spring sits to the inside edge of the other spring perch, it's 40". The mono leaf spring perch is 1" deep where the multi leaf perch is 2 1/8" deep.

Hope that helps.  

You may also want to take a look at the overall width of that rearend. 2nd gen cars are I believe about an inch wider. they will fit with modified perches, but it will limit your tire and back-spacing options.  I have a friend with a 69 camaro, which has a mid-70's camaro rear in it.  With 8 in vette rallies and 255/60's, the tires rub on hard acceleration  

Thread from carfulmechanic i made couple of rear end swaps  i am not  sure  about different years but; I  

i would recommend a 3.23 orlower ratio  

I Have A 79chevy Monte-Carlo With A 2.41 Rearend I Have NoBottomEnd Take Off So I Felt A Need To Share This With YOU  So You Could Take Advantage Of Better Performance If You Could Afford A Little Extra Cash Good Luck  

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