Which Heads

I am rebuilding a '77 chevy 350 that will be going into an '88 Camaro. I have a set of 882 heads and a set of 14014416, which I believe are originally for a HO 305 engine. Which heads should I use? What are the pros and cons of each? The engine will have flathead pistons.

Thanks alot. That's what I was thinking, but the higher CR got me thinking about it.