I'm convinced the previous owner screwed up the chip in the car - NO I haven't physically checked to see if its the stock chip in there or not, (I just thought of this actually), but he left a few random chips in the console and I have fuel problems (richness, etc) and a rattle in the exhaust at a certain RPM that is possibly caused by too much fuel that isnt burning up until its in the exhaust; so
I think he screwed around with it. Regardless, I want to make sure I've got the right program in the chip. I'm quite new to PROM burning but I understand the idea. I'm not gonna ask how to physically burn it cause I know I can find that out, but I'm lost when it comes to the actual programming. Can I get all the stock programming in a file and just burn then file onto the chip or do I need to fill out all the parameters with the stock values in a PROM program and then burn the chip? Obviously, I need to know where can I get the stock programming/parameter values for my car. Its a 92 SD 350. Thanks guys.

go here and get the AUJP.bin
ftp://ftp.diy-efi.org/pub/gmecm/bins/1227730/

Just AUJP.bin? What about the AUJP1350? Is this really all I need? (Guess I'm showing my ignorance....) Thanks so much for your help, too.

nope, just AUJP

Thanks bud, that really helps a lot.