Why does my car feel sluggish?

AdamR said

Have a friend hold the gas to the floor (motor off) then see if its opening the throttle blades all the way buy moving the lever back by hand.

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That's probably the better way, that way you can tell if everything is working correctly.

16* initial is a good start. You might eek out a couple more degrees out of it. Ideally like Adam said you want 36-38 all in by 2500 at the most.

You are doing this with the vacuum advance unhooked and plugged, correct?