so i could use the distributors output to send signal for spark to the fic, would i need to add a crank sensor from, say a later model 3l from a van? and run it solely to the fic, or would i need to see if i could pick out a wire that has a tach signal for the fic to read for rpms? or does the fic even really need a crank sensor input to work? i have a greddy already, but if altering timing via the fic can be done relatively easily than i could sell it and go this route instead.