im looking for someone who has a GM 3400 V6 in a grand am GT. the story is im trying to do a gauge pod swap on mine. the SEs came with a speedo that pegged at 120mph and the GTs have a pod that goes to 150mph. i was wondering if i could change the VSS pulses per mile and tranny pulses per mile ect and get the car to accurately read the speed on the gauges. ive had them in the car before and the speed was off. the needle would always be where it shud be to read the correct speed on the 120 gauge. so 60 was showing as 75ish. any ideas? there arent any tunes in the repository for this car.