i'm @7.9(static ) with a 177 wieland 5lb- ( mota was built for a 8/71 alky mota @ 40 percent over ) i'm happy and have alot more room to build power - - do you know what head gaskets you have ? for a quick low budget fix head gaskets and a shave ! you can also utilize blower boost with cam selection . nice lookin cruiser by the way