budget 273 build

Yeah I was wondering how large of runners the edelbrock torker has, and is there a difference between runner size in the torker 2. I wanted to stick to the stock manifolds instead of headers because the headers are 1-5/8 inch and that seems to large for this engine especially when I only plan on turning it 6000rpm. 260 degrees as in advertised or effective duration? If you can, can you explain why the lower compression with more advance will make more power and is there a happy medium? Because it wouldn't make sense that going to a 9 to 1 or a 8 to 1 compression and jacking the timing would make more power than a 10 to 1 with the appropriate timing.