total advance ?

moper said
total is typically measured without the vacuum advance (hose disconnected and plugged), as it has no effect at full throttle. You should be aiming for around 36° total with a factory open chamber and stock cam. If it is not a full time drag car, a correctly set vacuum advance will only help in streetability, milage, and power.
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Exactly. I run my basically stock 340 with 18* inital and 15* in the dist for a total of 33* total mechanical in by 2500 rpm and another 17* of vac advance. There is a night and day difference in the part throttle response and driveability with the vac hooked up.