ok i have a 85 z28 with a 350 in it. it was tpi but the guy took it off and put a carb on it. when i bought the car the carb was crap and i put an edabrok 650 peformice on it. the timing was off when i bought the car and now we been trying to fix it for the past 3 hr and have been getting no where. the car still diesels out. and to make things wose the guy i bought it from put 4 marks on the balincer and we dont know what each one means and the guy phone dont work any more to ask him

 

There should be a notch cut into the harmonic balancer as your mark to follow. Where are the marks that the p.o. put on, in relation to the notch?

 

There may be a big groove in the balancer that you do not use. That is for a probing device that goes into a tube on the timing tab. The balance should haveone small groove in it that you use.Its about the size a hack saw blade would make.Also does it have the original distributer? It is computer controled. Normaly there would be a brown wire that needs to be unplugged so the computer does not adjust the timing as you are doing it. But with all the elctronics gone from the TPI set up you should also have a distributer that operates independant of the computer.