I have installed the MSD EFI on my Pantera, and have logged 800 miles. It has performed excellent. The car has been driven from a base elevation of 1,200 ft to a high of 5,000. My recent trip of 350 miles from Phx to Tubac and back to Phx was a blast. The next outing will be to Yuma in the next three weeks. Thanks MSD for a great product.