Was the copper crush washer under the primer pump removed before the new one was installed?

Hows the fuel pressure relief valve?

Engine dampers?

Transmission mount?

Injection pump timing?

Throttle pivot mount?

O rings on the spin on filter bolt?

Under the tank rubber lines?

Fuel tank strainer?

There are a lot and I mean a lot of things that can contribute to rough idle.

Before you go digging in, you really want to make sure you have two good lemforder/phoenix engine mounts and transmission mounts and then move on from there...

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