I have a rebuilt 327 bored 40 over with comp low to midrange torque cam. The intake is a TR1Y edelbrock with 2 450 holleys. I have rejetted the carbs to primary of 63s and secondaries to a metering plate, not sure what they are.

The car runs like a bat on just the primaries, it hauls. When I hook up the secondaries and punch it, it dies.

I have a mallory unilite distributor and run high test gas.

Some of my friends say leave it alone, it is fasty enough, other say you have a vaccum problem. This may be true, how do I fix it.

Any help would be great,