[ed cougar]

428 scj, 4sp, 391. Hi, looking for advise on the vacuum retard port on my distributor. I now have it hooked up directly to manifold vacuum and the outer advance port is supplied by ported carburetor vacuum off the holley 735cfm. The vacuum tree that was originally in the water neck is long gone and I'm useing the hole for my mechanical water temp sensor. I set the initial timing at 12* and when the manifold vacuum is hooked up to the retard port the timing drops to about 8* It idles nicely and runs strong no ping on hard acceleration and no deiseling when I shut off motor. I hooked it up like that thinking it would prevent backfires when decelerating and when I chop the throttle between shifts, It's probally all wrong and could run even better than it does. Any advise would be appreciated.