Other than the vents, is there any difference between an opti distributor (the whole unit) for the '93-'95 & '96-'97? Except for the vents, are they interchangeable (same mounting holes, gasket shape, etc)?

 

Might want to try a search.... I answered this question two days ago in another thread. They are not interchangeable without changing the timing cover, timing set, the cam and the harness, and adding a vent harness.

And the unvented are 93/94 and the vented are 95-97.

[EDIT] Didn't take long to find it...

http://web.camaross.com/forums/showthread.php?t=378819