[olddog]

I think 89 was speed density. If so it doesn't have a mass air flow meter. Yes SD doesn't handle cam swaps as well.

Moats sells a quarter horse chip that will give you full access to do anything you want to your eco. The question is do you invest in 30 yr old technology or go with something new and better. Your capacitors are ready to die in your ECU. They can be replaced.

Your looking at $3000, to upgrade to a good modern fully tunable EFI.