You can replace the dizzy with a crank angle sensor. this tells the ignition module what the crank angle is and works out the appropriate spark duration and timing from there, no more rotor button.

....um was that right, i dont really muck around with that stuff. Another thing, people are always saying it would be nice to put the E15 turbo head on an a-series block if it wasnt for the dizzy position. Why dont they replace it with a cranky. they van be made to be compact, a friend of mine was going to do it, havent spoken to him since tho.