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definetly sounds like a fuel pressure problem. You didnt mention if it smoked while it was acting up so heres some things to check...
1) float setting in the holley might be too low and youre running the bowls dry. if you would have continued on it most likely would have started surging, ie running on the pulses of the fuel pump. if it was smoking at the time it may be just the opposite.
2) check or replace the fuel pump. ideally with a carb you should have NO MORE than 6 psi and no less than 4psi.
3) Check the fuel filter.
4) and just in case all those work out good, check youre timing. both static AND full advance. you may need to raise the timing. 351M400's are very timing dependant.
paul
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Prostreet 1979 Ttop  1997 Limited Edition
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