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Hey Mike, I have done nothing but try to get this thing running, I am going off of the previous owners word that it is a fresh rebuild .30 over with a 428 crank. I have not done any compression...

Thanks for the info, when I get it pulled apart I will look into this OFFY. Like I said, this car is a torque monster, just waiting to get it running right.
Mike

Dave, you are correct, I checked with the Carb Shop and it is a 780, my mistake. BTW my last Holley was a 650 on a 68 Firebird 22 years ago! The current manifold is an aluminum Offy, not sure if it...

I just had the carb at a very respected shop in Costa Mesa. I thaught it was a 780 but was told it is 790. I will be pulling it apart in about a week to check the offy intake with a straight edge. In...

Nubie here, recent owner of a 69 mach 1 with a 390, .30 over with a 428 crank (told this is called a 410). I have a Holley 790 and long tube headers. The current Offenhouser intake is leaking like...