SonomaSS

I have a 1992 Sonoma Gt I put in an Lt1 Form a 96 Caprice. I got all Of the wiring with it up to the firewall. but no obd2 connector. i am sure you have heard this part before. It runs great for four seconds! and then Dies! Damn! I am so close. is there anything i can do about the vats system without a obd2 connecter. i don't have the vats control module i tried doing the ground trick of the pin 25 on the red connector which is the connection for the vats. is there more security inside the computer? Also has anyone ever pinned out there own obd2 connecter? Please help