[Licensed to kill]

Got the timing set and the points gapped to spec, found and fixed a vacuum leak and tightened up exhaust eliminating slight exhaust leak. Runs pretty good but still backfires through exhaust on deceleration. Been playing with the gav but even with it closed all the way, the plugs show rich (and wet). Should i not be looking for nice tan plugs like in other cars??. When in open the gav a bit (about 1 turn) it does seem to run a bit better but those plugs??!!!!!