Ok so I'm trying to get all my ducks in a row before the engine swap. I did a search through the forum for headers and came up with 2 possibilities, Dougs D313 and American Racing Headers. I had hoped to re-use my factory exhaust manifolds but ARH told me probably not since the crate probably has "D" exhaust ports. Anyway as most of you know ARH are a tad more pricey, but everything I read there were no "mods" needed and no need to move or shield the proportioning valve. One thing that impressed