What ET should my Duster be running?

.080" in the hole is never a good thing. Take the engine apart and have the block decked .080"

This will wake up the engine and allows the intake to sit higher up on the heads, so the roof on

the cylinder heads can be raised a little and get a good alignment with the intake port roof.

The other thing I would do is get a MSD 6 or 6AL. You need better fire in the wire.

Tom