ive got a stepper control circuit already, it is 7.5deg per step, 48 steps per revolution, and 600 steps for a 12.5rps.
I just need a circuit that generates the 600hz pulse, and varies that pulse based on the sync. probably consists of another PLL circuit, but you wouldnt need the optical fork, and it would have perfect frame lock.
i fried my 40406
swung a 30 volt rail by accident, and cooked it.
I do have an lm565 which is a pll.