If you have trouble finding headers to fit your early A (Clifford Shortys being the only ones I know of), another option is Dutra Duals. This allows you to keep your intake manifold heat - a really good aspect for a daily driver. Doing the HEI ingition swap and getting your distributor recurved will also perk up your motor. If you don't mind swapping out the cam, something to let it breathe a bit better will also make a difference. Use the search function on slantsix.org for engine build ideas. The gurus there have done every kind of slant build you could imagine.
