Ive got a 250 pre crossflow in my XA Fairmont with 94 thousand miles on the clock! These engines dont breathe very well so i put on extractors and a 2 1/4 inch exhaust. The power gain is very good. i dont have the money to put a V8 into my car and i dont really want to because every one does that and my engine hasent done very many km. What sort of cam should i get to increase power? And how much would i be looking at for the price of a cam?