header/manifold question

You can make a stock car manifold (not SRT header, the plain cast one) fit with some work on the passenger frame rail. You have to scallop out a chunk and weld in a filler panel (look for posts from GDemon, I know he used them), but if you want an easier fit I think the stock truck manifolds have the most useable outlet position. TTIs are a moderately tight fit, but designed for the car so it's a little less work to get the rest of the exhaust system figured out.