first of all, the spring heights are too short for that cam, you will have coil bind big time!!!! secondly, piston to valve will probably hit. there is not much room with stock pistons for big cams. also, to install a roller, the oil passage on right side has to have tube installed for oiling, about most lift with stock springs is .500 lift, need to go different route. BTW, the stock intake and carb will not hold it back. a 71 340 duster, in D/SA, ran 9.92 @ 130 mph. has stock intake and carb. imagine that !!!
