A lot of what was said here needs some punctuation corrections, it's sorta hard to discerne what's really being said. On another note, if you haven't heard of BOPC before then I'll explain. It means Buick, Olds, Pontiac, Cadillac. When you get a BOPC transmission the center of the mount is shaped in a downwards V instead of up like on the Chevrolet style. But whatever. So for you and your needs, since you don't have too much to work with, go big block and retain the stock stroke since the stroker crank will cost you another chunk and bore that beast out. Get some bigger pistons and go with that. You can build one for under 2000 if you can find a good used core which retains most of its parts and wasnt blown up. Cam, pistons etc.

But if I was you, I would start right and have everything on that block machined, etc etc. IMHO don't start something like that unless you are gonna do it right. If you needed it now then well, go for it. But I would most definately make the internals the way you are gonna want them for a long time. You can toss on bolt ons way easier in the future when you make some cash, but do the inside the right way or you might just have to pull it out again and tear it down. If it takes you another year then it will likely be worth it.....year = money = power = durability. Have fun with it.