Dave if you want to pay me to find a way I will do the work. I pointed to a link with a lot of good info. My understanding is you have to de-solder the factory chip solder in a socket and profram the new chip. I also am sure that a proper written rule would allow and obd1 upgrade to a car that could be proved otherwise.

The early obdo 240sx is handled exactlt as I described. Radio shack and Fry's electronic's made the mechanical part easy. the web made the software and the help to do the first one I ever did. It just took desire to do it.