I spoke too soon. What distributor are you running on the 350? Points or HEI? Both have mechanical advance mechanisms, so the vacuum advance is supplemental and only works when you are "cruising" down the highway at part throttle. At WOT it wouldn't work anyway, there's no vacuum at the port and at idle it's unnecessary; so I still say timed
BTW, what's wrong with a Q-Jet? If you don't want it, send it to me!
