I bought a '66 olds 442 10-bolt 3.08 posi for my '69 chevelle for a very reasonable price.

It's obviously very different than a chevy 10-bolt, but I believe the control arm mounts will all be the same. I know it's 1" narrower, which is partly why I bought it. (tire clearance) I want to know if I'll need to do anything different about springs other than running 64-66 style springs (non-double pigtail). Will the spring mounts need to be moved?

Also, I do not know yet if my chevy 10-bolt brakes and backing plates will adapt to this rear (I have rebuilt them recently) Anyone tried this? If not, I have some caliper brackets for converting to discs if I decide to. (the brackets are also for chevy 10 and 12-bolt) If the backing-plate bolt pattern is the same ??? I should have no problem putting rear discs on, Right????

Thanks!

I want to know if I'll need to do anything different about springs other than running 64-66 style springs Not sure, but does the Olds rearend have the bolt-on spring retainers (like the early Chevelles)? If so did you get them?

Not possitive the driveshaft will work. Depends on how far the yoke sits from the axle centerline, and is the u-joint the same.

I would think most likely it should bolt-in easily...

For the brakes, not only check the back-plate bolt pattern, but measure how far the axle flanges sit from the axle-tube mounting flanges...

I believe the brake backing plates are different. The drums, shoes and hardware may all fit unless the rear end came from a wagon, then I think the brakes are wider.

ive done this swope before i used the backing plates off my chevy housing i think .i believe the drive shaft was the same lenth also but had to use basterd u joint.all the control arms should line up also.you will have to use the 66 springs that bolt on the bottom perch the swape i made was with a 442 rear in 72 ss chevelle