Modified Engine work includes upgraded cam as the original general tuning is very conservative, we therefore replace the cam with a modified cam and our own custom US made hydraulic lifters, add modern design forged pistons 9 to 1 (very well known company) (the original engines were this ratio, therefore block modifications are not required), engine balance, we do head upgrades with stainless steel valves, beehive springs, retainers and head porting, carburetors are re jetting and add an electronic ignition with distributor advance adjustments, the performance will increase approximately 150 hp. This is with dual exhaust and modern low resistance cats. This 150 HP increase (very conservative est.), the engine HP ratings varied between 1960 to to 1996. $12,345**
