The OEM AMC distributor (80+) is PERFECT for triggering the GM PCM that JeepsAndGuns mentioned. I have not tried the batch fire MPFI route, but I am using that ECM on a TBI system. It is fantastic and has tons of settings. It's like an ODB-II PCM without the cost or hassle. :D

I would highly recommend retaining the computer's timing control function. Much better than trying to "re-curve" your distributor. You can keep your MSD at the same time, too!