Originally posted by dennis kelley
Is your vac advance connected to timed vacuum port or constant manifold port? The reason I ask is because I have a mild cam in my 302 and it pulls crazy vacuum at Idle (15inch) and my initial timing is extemely low 4 degrees. I was thinking that if I switch to timed vacuum I can increase initial and have better response. Any opinions appreciated. If it wasn't so cold out I get the car out but no heater or top no test drive until warmer weather

Anytime you go from manifold vac. to ported vac. you gonna hurt your response time. you will gain it back some place else, but your response time will slow down. try it both ways and see.