Hello i was wondering if anyone on here has the answer im lookin for, i have a 620 that i previously owned and got back but i got it back with a z22 in it and it has a weber 32/36 and im putting a pacesetter header on it this weekend, and it runs great and has good power but it doesnt have the vacuum advance hooked up that is on the distributor, and was wondering wether or not it helps or hurts the motor/ power,
any input would help at this point because i cant find anything about it
Thanks