Getting rid of learn burn.

as far as the "legal-ness" of deleting lean burn, all the parts catalogs list it as a "with-or without" thing. Meaning that they built these trucks either way in a given year.
Meaning that if "some" were made that way from brand new then it's OK to switch between ignition systems to eliminate one (or the other)
I've seen people do the delete and put the new ignition box inside the Lean Burn housing......