Im putting a VR6 engine into a mk3 8v, which is OBD2. It already has the 288mm brakes etc, so its just an engine, box, pedal box, clocks and loom jobbie. My question is if i buy a obd1 engine to fit, will this give me problems, as the car currently is obd2 with the 8v engine, and the other systems, like the abs are obd2, although im aware they have their own ecu. Just wondering if i used an obd1 engine and ecu, it would cause me issues or not? Ive been offered a sub100k engine, with a rebuilt gearbox, and all ancillaries for a good price, so providing i can use it, i will! Cheers Mike