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Yes i'm sure it's hooked to ported. Off metering block. It's Holley 750 vacuum secondary 3310-4. Looks like time for new H.E.I. distributor. Pull old one out looks like seen better days.

Don , It's hooked up to ported vacuum. I got pull distributor out later in day.

The distributor is points style with H.E.I. conversion kit. What it's doing when rev engine up the distributor is advancing and staying advanced. Will not return. This problem causing engine run hot....