12 bolt in a 85 regal question

[muthstryker]

Hey guys new to the site, long time lurker. well im getting ready to buy an 85 regal limited from my friend and i have a 67 GTO, well im not useing the 12 bolt rear end on the GTO, im going with a moser 9 inch.


my question is:

how much do i have to shorten the 12 bolt?

i know the mounts are at a different angle but i saw that umi has parts for it. so i think i would be using those.

Thanks.

Matt

 

[hobbes442]

you dont have to shorten, it will be an inch wider each side. just looks wider and limits what wheels you can clear fender with when going wide

 

[Chris Borson]

Who is UMI I am interested!

 

[R/T kota]

You will need to relocate the trailing arms.
We used an old A body 12 bolt on our old mailibu. Ordered a custom offset wheel for the back and had plenty of tire clearance.

 

[85 Cutlass Brougham]

I think Southside Machine has a set of LCA's that adapt an A Body rear to a G body with no cutting. They are around $300 IIRC.

 

[ducky_1978]

shorten it 1 5/8 of an inch per side and use 62-67 nova 12 bolt axel. that is what i did works out great .will use same offset wheel as front.

 

[shotgun]

I am selling a set of SSM bars to do this,check the classified for pictures.