1. I think it flows great for the 318. It's 2.5 inch to the merge collector and then true 3" all the way out. All mandrel bends. Now if I stroke it to 390 I don't know. Depends on how radical I get with cam selection.
2. Three reasons: 1) the transmission cross member only has one "hump" in it for exhaust clearance 2) Wanted to emulate the stock system 3) Look under your car. Ever notice the gas tank is offset to the passenger side of the car? That was to make room for the stock single exhaust. Duals can be done but not within the "vision" (beer haze).
The major reasoning behind not modifying the car (too much) is to be able to take it back to originality. If fully restored it could be worth some big bucks, of course it would probably take more than it would be worth to get it there and that is why I'm not doing a restoration. Just don't want to cut on this one. I've got another project that is underway you will probably like but I'm going to finish this saga 1st.
