I just got my 92 gt from a kid that had put in a rebuilt 5.0 only had 34k incl cam, holley annihilator distributor, BBK headers, Flowmaster h-pipe, Performance plus 75mm tb & spacer, replaced iac, egr, wiring, deleted fuse box in the bay, new maf sensor, spark plug wires, & Jet Performance chip on the A9p ecu. Always ran boggy, but strong. Said when he put the motor in, the OD stopped working. That chip ended up frying the motherboard & I finally found a ecu but it's the c3w and now there's a drone that's been getting increasingly louder as time progresses. Everyone says I'm just freaking out, but IK what my car should & should not sound like, especially going 55mph & can't hear the radio. Also I can feel od grab but slips back out, any help would be very useful