I face much the same dilemma! I too have a 440/.509 cam, short tail 4 speed w/pistol grip, A727A & B, S & BB bell housings, 8 3/4's w/ 3.23, 3.55, & a 4.10 gearset to boot, cop steering box, & a complete T-Top roof from an '82 Cordoba just waiting their turn on My Imp. If you stay 360/904, I'll buy the BB mounts off of you. Wish I had an O.D. So I could run the 4.10's. I don't have everything I need for any conversions, I need about the same for each set up. I need the typical, pedals, column, etc... Oh well, keep us posted. Larry