okay i had a missing probleem so i put a new fuel pump on fixed a vaccum leak but it still isnt right now my question is its a 440 built to 69 specs its got 10.1 com 346 head dual plain eddy intake with eddy 750 performer carb ive timed it by ear wich always was good but now im gonna go at it with a light were should timiing be the best at and what kinda fuel pressure should it be running im gonna check this stuff thanks