I’ve used the KB-107’s and the SpeedPro c116hp. There heights are very close to each other. With a J head, gasket thickness dependent, you can zero deck the piston and get a 9.8-1 ratio with the chambers being 72cc. Coupled with a reasonably healthy cam and overlap, this is pump gas territory and capable of mid to low 12’s with very streetable cams and gear ratios.
One example would be a 292 Purple cam and 4.10’s on 28 inch tires will get you mid 12’s w/un-ported heads.
BTDT
