As said, lazy throttle response is, usually, not enough initial timing. Have you bumped it up 2 degrees at a time and see if that makes a difference ? Not unusual to have 18-20° initial. If your mechanical adds 23, you'll need the limiter bushing to get that back down.
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Mitch
1970 Chevelle SS
1966 Chevelle SS
1967 Camaro ss/rs
1938 Business coupe, street rod
2000 FXSTS, original owner, 13k miles
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