I have a seventy two malibu with a non original 350. I installed a wiring harness from m and h myself. however the harnesses wiring for the water and oil temp sender etc., does not fit the senders on the engine. can i put the senders that fit the wires in this engine or do i need to alter the wiring? Also, the car has dummy lights which suck. i want a supersport dash that way i can have guages. Is it a hard conversion?