There are several places in Phoenix that can do mods to the program for your ECM. An 85 is probably a tuned port....one of the most modified ECM modules. Try Arizona Speed and Marine in Chandler or UMI Racing in Snotsdale.

You buddy Ryan is blowing smoke up your butt. The later model ECMs do not have "chips" that are replaceable....in fact, the modules are sealed. The program is flashed thru the connector at build. It can be changed but not with a "chip"

There are some junk gizmos that plug between the module and the harness connector that max out a sensor signal.....a half-assed modification....kinda like adding a chrome wing nut to your air cleaner.....makes you feel good but it doesnt do squat.