Doug's or TTI headers

on an early abody the TTI have larger tubes, the TTI are really tight especially it running larger then stock torsion bars..

if i do another early abody i'll deal with maybe a little less power and go with the smaller tube dougs.

I have stock torsion bars, I’m gonna say 350-400hp is what I’m going for with my 360. So I’m not sure which one would be better 2.5” or 3” ?