Thank for the input, guys!
There is no stand-alone crankshaft position sensor on an '88 TBI engine; I believe the distributor does that.
As for your comment about the ECM not getting a signal from the distributor, indeed, it makes sense and goes with the idea that the pick-up coil could be the problem, since the module tested good at the parts store a few days ago...
I have tried 2 junk yard computers, I guess they could both be bad (although SES light and fuel pump work), but then, how many do I have to test until I accept that it is not the ECM??
On the other hand, the ECM is "not used" until the engine reaches 400rpm, so it feels more like a distrbutor issue (back to the pick-up coil) than an ECM issue.
