Distributor interchange?

[kzbill]

I replaced the distributor in my 91 L 5 spd.
everyone talks about a "Hall effect" dist. with four arms that pass by a coil in the distributor and create a voltage signal to the ECU.
Mine appears to be an optical sensor with a slotted plate located under a metal cover. I looked on the rock auto site and there were 5 "hall effect" distributors and one like mine. the casting numbers are the same but all but mine had a "B" after the number. Does anyone know if these distributors are interchangable?

[WmWatt]

The distributor sits between the engine shaft, the computer, and the spark plugs. It has to be compatible with all three so I would assume they are interchangeable even if they differ internally.

[kzbill]

I installed the new optical sensor now all my ignition problems seem solved even the low speed miss or "pop"
I also had an issue with the Idle air control motor, that was the bogging and stalling.

[kzbill]

it was copper plug wires causing RFI interferance after all that work