[Beach Cruiser]

Ok, I'm finishing up the swap in my 67 Camaro and I'm having some trouble keeping it running. Then engine fires right up and the idle attempts to adjust then it dies after 5-7 seconds. Almost like I turned off the key. It will do this over and over again but won't stay running. Could it be the VATS? I pulled all that wiring out of the harness and grounded the yellow/black wire thinking that would bypass it, is that the right approach? Should I have the VATS programmed out of the ECU? Not sure where to start with this one, this is my first LS swap. I'm just glad it fired up on the first attempt! Drinking my beer now waiting for help from you guys!