1962 GMC 305V6 4WD Slow DD Build - Cecilia (Pic Heavy)

[awbrown]

simply hook the gauge to manifold vacuum and adjust the screws til you obtain the highest reading ,make sure the engine is fully warmed up and that the timing is correct.. also verify that the vacuum advance (if it has it ) and the centrifical advance is working .. as far as the hesitaion , make sure the accelerator pump starts spraying the instant the throttle is opened..any slack or slop in the linkage may cause it to hesitate...you can bend the linkage to remove slack..