I noticed that you said you changed spark plug wires also. Did you check to see if you may have crossed a couple of wires and changerd your firing order. This happened to a friend of mine. Had two wires crossed and it started fine, ran fairly well but ran hot.
If the timing were set too far advanced, and the car were running hot because of it, it would ping.
If the timing were set too far retarded, including possibly at the stock 6*, then you could ALSO be getting overheating problems. Remember too, just because the balancer is saying 6*, that doesn't mean it's really at 6*.
If you're not pinging, try advancing the timing and see how she runs.