I really didn't know where to put this question:

Has anyone build a hybrid system to run (in my case) a big block chevy using a distributor, or crank tricker/coil system, and injectors?

Here's what I'd like to find out: can you custom program a late model ECM and have only the fueling run by it? (you'd still have the distributor and mech advance). Best, could you do that, and have a crank trigger set up to power up 8 LS engine coils. I'm looking for the ECM to control fuel and ignition, but no KR or other things...although I do have room for engine temp sensor(s). It would have to be SD...although with 5" of vac I don't know how well it would work...but besides that, would it be possible?