Unless it's a really hot 327, I think you'll be fine with an 8.2. The drag strip (traction) is where you hurt these rears. I ran one into the low 11's before I finally broke it. It ran mid 12's for a few years with 3.73 gears and an Auburn posi unit.
It's real easy to tell the difference between an 8.2 and an 8.5 The 8.5 has lugs located on both sides at the bottom of the center section, see pic.
I'll see the rear-end today. I was told it had over $2,000 in the re-build and had the bigger bolts (?) or more bolts, as described above by Ray (THANKS RAY) I have to keep reminding Tom (Nelsonracingengines.com) I'm not trying to build a hotrod, just a nice drivetrain with the "right" stuff; for me personally and for re-sell value. I spend time here looking at old threads and posts,... but things are moving pretty fast now and appreciate all the help I can get.
thanks Zman. If I had it to do over, I probably would have gotten a good used 12 bolt. the buy building my engine jus so happens to have built 2 of the fastest Camaros on the planet (literally: go to YouTUbe: "F-bomb, 1200 h.p." I don't know if he even knows how to build a mellow engine, we'l see!. thanks.
really!? that's good to hear. I'm learning as I go, myself. Some people say rebuilding an engine is like putting a pool in your back yard... you'll usually get your money back. The question is: if you build an $80,000 pool, will you get it all back.