This 1970 Ford Mustang Mach 1 is allegedly a true “M ... the hugely important numbers-matching 351ci (Cleveland) V8 engine that’s mated to a C6 three-speed automatic transmission.

"I bought a ‘brand-new' engine ... the folks at www.351c.net for helping him out with carburetor and exhaust issues that were eventually worked through to get the Mustang running tip-top.

Scott Mays purchased his 1970 Mustang Mach 1 with a 351 Cleveland (351C) engine through Craigslist. "It's a true Mach 1," Mays says proudly. "The previous owner had the engine rebuilt but could ...