I bought two K1 cranks years ago off of Dan (Performance Only) during a Winter Special he had when the chevy journal cranks became available. I used The K1 crank and K1 rods with upgraded bolts and that assembly was rebuild 3 times over the years and was in need of its forth when it spun a bearing. That engine ran low 9.70's in my Duster and served me well. I will be using the second crank I got from him hopefully this Winter with some more compression, bigger cam, and hopefully run some 9.50's.