SB or BB a body debate
Junkyard Magnums are everywhere, picked mine up complete for $300, got a rebuild kit from northern auto, (even though you probably don't need to rebuild the bottom, I just did it as a precaution.) and I went with the bare RHS X heads and reused the magnum valves, used Hughes 1110 springs and junkyard 2.2L k car retainers. Frugal and great. Take you pick on the edelbrock vs crosswind intakes. If you regrind the stock cam you can save some coin, Tim at bulletcams.com did mine, it's a nice piece, 200-250 shipped both ways.
Quite the powerhouse. I haven't taken it to the track yet, there are similar builds that get 11.7 all the time. (JoeDust451, LXguy) Good luck, have fun!