And using 12.1 pistons will certainly speed the blowing up process! Are you going to use methanol?
+1 for that. I once had a Triumph with the 11.5:1 piston s and it was just too lumpy on the road, terrible vibration and very hard to start. I'd reckon any compression ratio much above 9:1 s built for racing, or just posing.
Shoot, a man could have a good weekend in Dallas with all that stuff...