I read through the FAQs concerning swapping the ring and pinion gear and while there is some good information in there I am still little unclear about a few things. I have a 68 400 w/factory, still running the stock 2.56 setup. For 68 the Firebird used a 8.2" 10 bolt setup, and the 10 bolt refers to the 10 bolts which hold the ring gear in place - do I have that right? Also, I see the BOP ring and pinion are not compatible with Chevy - is that correct?

I also see some references to gear housing limitations. My problem is that I have seen 2 different limitation guides. First one said you can go up 1 step meaning that from 2.56 I can go to 2.78 without housing mods. The next step would be good for 2.93 & 3.08. and so on. The second guide I found said from 2.56 one can go to 3.23 without housing mods. Which is correct?

I see lots of gears being offered for 3.36 and above but I am targeting 3.08 (in conjunction with a THM400 overhaul). Where can I find a hi quality BOP compatible 3.08 ring and pinion? Thanks.