Going the 511,ported stealth heads into a 72 cuda, manual brakes ,727 tranny. TTI 3" duel exhaust with H pipe. It looks like TTI only has a 1 7/8 header to fit this combo.I currently have 1 3/4 headmans on my 383 going into the TTI exhaust. My new engine will be over 600 hp.I can get the the 1 7/8 TTI headers.But would I be better with 2 " headers? I don't see differnt heads in the future.I also don't see headers that might fit to my exhaust that are 2" ? What would you suggest? Will the 1 7/8 be fine for this street combo?