[john]

Yeah, if the engine that was off a 90 came with all sensors, there are a few of them that are different. They are kind of obvious if I remember as they will not fit in the same plugs. I know that the coil connector is a different shape and I am pretty sure that the power transistor is different. If you have a 90 TB, it also hooks up differenly. Seems like you would have had a bit of splicing to do. Check the coil wiring to see if any of it was cut for the MSD. See if you can get ahold of the prior owner to see what unit he had in the car. Then ask him if he had to cut anything or check it out on mdsignitions.com.