Frame Vin: ZA7S 12480
Motor Vin: Za10 2384 HC
Transmission has AD stamped in it
To my understanding I'm working with a 1950 plunger frame, with a 1950 a10 motor. What does HC stamped below the crankcase vin mean? The transmission shifts top to bottom; 1,2,3,N,4..I've been told that is not normal, the PO said he had put a couple hundred miles on it that way. If I am correct on the motor being a 1950 a10, is it advisable to run valve clearance at .015 intake and exhaust? I have read 2 different specs in different locations of the haynes manual for this motor.