Where can i purchase the original Camshaft for my 1972 Datsun 240z? My car has been upgraded with the following specifications: New Datsun L24 motor with crank and rods from a L26, special oversized 84mm flat top black coated pistons from D.L. Potter Engineering with E88 Head and Far 311 New Race Cam. 2 original SU Hitachi round top carburetors rebuilt with race jets / needle. I am having stalling problems and really want to go back to stock!! What parts will i need to purchase in total beside