I run vacuum advance on my 10sec street car. Works well, gets great mileage, and the plugs always look great. Just requires the distributor to be set up correctly and you need a adjustable vacuum advance to limit the total.
68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780# 69 Roadrunner 511 six pack 10.92 drive to track street car
