Small block to big block convert questions..

I am in the final stages of a big block/a-body build. If I had it to do over again I would go mega small block. Much, much easier build and the $ are about the same. If you must go BB try to go low deck (383/400). BB chassis headers are available. You don't have to hack up fenderwells. "Street is neat, but, track is where it's at,"
That's what I was gonna do, a 400 base built to a 512