Headers VS Manifolds

I know one thing, I'm definitely going to headers when I rebuild my 318 with 10.5:1 comp and RHS heads. If you do go manifolds try to use the biggest ones that will fit; if not factory 340 ones then 360 'logs', but I daresay use 318 or 273 ones because they are SMALL... You might say "only 1/2" difference in outlet size" but that is a HUGE difference in a 2-2.5" hole!!!! But it is your car, so I just recommend getting the best you can afford.