Nope, 4.6 DOHC N/A. They're slower than the Mach 1's, but with the right gears, bolt ons, they're still pretty quick. You might be able to find a clean Mach 1 for $15K range, but most I've ever seen go for more than that and have pretty low miles. I remember wearing out a yellow mach 1 in my Z28 a while ago