I am needing to find TDC so I can switch my distributor. What size is the factory center bolt on the crank of a 71 Buick 350? Intake is here. So sexy. Hate putting it on a dirty motor. but will have to live with it until I can back the wagon out and fire up the pressure washer. Decided to just do the whole Sniper install, CD box, coil, distributor, and throttle body. Plus new wires and plugs. Might as well go for the gold. Thanks, Tim
