Dude, just build the thing. Don't get all hung up on compression. I have my 7.7:1 400 sittin on the stand. It's goin in a A body for God's sake! It'll be quick! Just build it and go.
How you'll fit that into an Abody is what I'll want to know! I wanted for some time put a stroked 400 on my 63Dart. BUt yes, I'll leave this 360 for low compression and easy gas. I have some other bloks I can highcompress, i guess. It just sounds so cringy...7 to 1....