Love your build man! I'm Puting up on lift when get out of work (supervisor on nights at a factory so hours suck) and put pics an measurements up. I mean if there isn't a way for headers I'll go for plog for sure since still beater then stock. As for the harness, all I'm losing is my time because it's $50 max at jy for the harness and ecu and found perfect donor. I won't go ripping parts or wires from the cavalier before I know for a fact it'll work though.
Txslow6: I personally love this car purely for the sleeper factor which is why I bought it I got the car for less money then anyone would believe and only has 25k on motor and 77 on shell. It's just a toy and I love the thing. Was actually looking at a 3800sc Buick when this came up for sale on local forum
Iforgot to mention big driver behind the obd2 swap. It appears the shop never hooked up the obd port so I couldn't data log with the moated cable I bought so couldn't do what others do with these cavaliers. I like to keep my hands busy on days off so I look forward to the swap