what headers fit

[mook]

Yep, make sure you get ones that will clear a turbo 400 if that's the way you are going (although I seem to remember in another thread you were discussing manual boxes).
4 into one headers can be close to the transmission pan and overheat the fluid on T400's.
Most headers will fit past a manual box with plenty of room.

Ceramic coating that they offer makes a huge difference to pipe temp. Here's hopeing anyway!