273 time to 'fish or cut bait'...

I shaved .030 off the heads and ended up with 9.6:1 static compression.
Higher compression is the way to go IMHO, for what the OP wants to to: stop-light to stop-light demolishing of the competition and then highway cruising without too much fuss. I was thinking of head shaving but did not want to complicate his life.

What head gasket did you use? That might be good info for the OP.