MAF conversion vs custom chip on an 88 5.0

It's been done, supposidly it's very time consuming and very expensive to have a program done specifically for a car that should have mass air.

There were guys on 50tech.com that were on a mission to keep SD, and it costed way more than just doing a maf conversion.
A maf conversion isn't all that hard or expensive, just do it the right way, so you don't need a dyno tune every time you touch the car.