This is an interesting option which I'd like to know more about. Does anyone else have any insight on the tight tube headers? My setup is currently a stock 318 with a Holley 600 vac on and Performer intake & 2 1/4" dual pipes. Cam is going in this summer & looks like it will be 224/230 @ .050 w/ .477/.480 or 218/224 @ .050 w/ .462/.470. looking to reach somewhere around 280-300hp range nothing radical. I do have power power steering will that make a difference in what will fit? Will I still need to change to the mini starter for clearance?