What was the question?? <g> 4 cyl DIS has no cam sensor, only double notch at crank sendor to start coils firing. Disk on balancer would work for crank sensor. Shannen TK wrote: > > Why can't you just bolt a disk with the proper notches onto the harmonic > balancer for crank trigger and use the HEI distributor for cam trigger? > > Hang on, I not ready for the punch..... > > Terry