My winter motor builds, two race motors, an A motor, more topend intended for larger faster tracks, and a B motor, more torque and more reliability. Both heads flow benched, ported and blend cut valve seats. Ti valves and retainers, and slightly stiffer springs in the A motor with a Falicon lightened crank and rod, Blanaced and welded. A CP 13.5-1 comp piston, a Web full race cam, and crossed fingers that it will last more than 5 hours, haha.
The B motor, stock crank and rod, CP 13.5-1 and a Hotcam and stock valves and spring. More reliability.