No reason for a basic bracket engine to be at that kind of compression ratio for sure. My little B1 was at 15.5 and worked pretty well for what it was. The one from the dragster is 15.3-1 and works pretty well too.

Id like to see the piston that gets you that kind of compression number for sure. I though I saw it was a world block somewhere but maybe not. 4.600 aint gonna leave much room between the cylinders on a 4.800" BS block for sure.