340 Chugging instead of Reving

1969GTS340 said

The jets are currently 72. It was a size I chose to start with. The plugs read that it's running rich. Black and wet. When I removed all the plugs during a compression test, fuel sprayed out of the plug holes the first few cranks. I brought the rpms up to the break up point and shut off the fuel pump. It popped until it ran out of fuel.

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That carb is black. That’s a reversion issue. Did you degree the cam? I had to ask but that’s bad.

Also, if it has so much fuel going through the engine that it blows out of the plug holes, you need to get some fuel out of it pronto. You’re killing the rings.

A 72 jet doesn’t sound outrageous but it’s getting fuel somewhere.

I can’t hear what you’re hearing but being pig rich will make them pop and bang and miss.