I too have witnessed first hand how poorly a 509 cam will work without the right mix of parts. Your gear is fine, but that cam likes every bit of a 3800 stall (and then some). It will also wake up with 20+ degrees of initial and 36-38 total timing. The vacumm secondary carb will work, but the dp will be snappier when in proper tune. That cam can make some good power when all your ducks are in a row.