the 273 club

OK 273 fans. Give you your thoughts on the benefits/drawbacks of using my stock 273 heads in my rebuild vs. going with a set of 302 (high swirl 318) heads. I'll be running 9.5 to 1 pistons in the rebuild. Oh, btw, the 273 heads will still need to be totally rebuilt, so any rebuild tips and tricks would be appreciated.