Pro Comp Heads & TTI

I think if you are running a RB the 1/4 of an inch will cause the header to hit the under side of the car as it is very close fit. If you are running a B, I think they will fit. (Sorry I have no pics of my 440 TTI combo)
Are you running a motor plate or mounts?
If you are running a plate you may get it to fit as you have a little more room to play.