Its designed around those small cc they will be cut for the bore. I went with a small combustion chamber head so later on I can put 72cc heads on there for the turbo this summer

TRT my 5.3 I checked it and it can bored to 4" with plenty of meat left over so it can be bored.

Huntin for low 11s on a 250 shot with a 3200 stall and an 80e

More pics will come when I get the block back next week.