So i was poking around EPC trying to grab the OVP relay part number to replace, just to be thorough. I notice that there is a different part number for cars to up '86 and one for 87+. the '86 is 6 pin, '87 in 9 pin. My car is an '86 and currently has a '87 9-pin relay jammed in the 6-pin harness connector.

Love used cars, hate previous owners.

Still compression testing tonight, but I'd be willing to bet the incorrect relay is causing issues.