A block exhaust manifold solutions

This is exactly where I am at now. I like the idea of headers and max power but the reality is that the moment they rattle or drag I check out. Basically my only remaining question is if the truck passenger manifold flows significantly more than my stock 318 driver manifold, because I don't want to unbalance the flow from side to side, and the truck manifold exits at the back of the block a little more cleanly than the a-body stock one and might make dual exhaust easier. But I'll probably just leave my stockers on the new motor too.