Quote Originally Posted by jerry clayton View Post
....Now , not to say that he won't be spending $$ on this conversion, but it does allow the keeping of an excellent EFI system and basicly just getting rid of the opti. I myself never had any issues with an Opti but I want to move it out to get rid off the wires down there so I can mount the alt and a/c close to crank area-- However, on my wifes 33 I did move the engine back toward cowl for more room behind radiator and its tight where the dist goes----but the driveshaft is shorter!!!!!!!!!!!!!!!!
I'm not familiar with the opti-spark distributor system, but as I understand it inputs to the PCM for crank position (laser through disc w/360 tiny slots), and the PCM then triggers the output to the coil based on the spark map that's in the PCM, and also triggers the injector pulses based on this crank position input, right? When you make this change you'll use an electronic distributor, but what do you do for the crank position sensor? Sounds like a neat modification, and I expect I can find out about it on the hot chevy sites with a little Google mining but it's lots easier to ask the guy who's done it before.