closed chamber vs open chamber

RustyRatRod said

My question from post 44. Still unanswered.

What kinda "work" would you recommend to better the 516.......considering that might be the only head someone has?

Click to expand...

I realize that this isn't an option for you Rob, but, Dad said the easiest way to get something done is to have someone else do it. So, the "work" that should be done?..........Box 'em and ship 'em!