ok got some vague answers here. first of all, whoever thinks that a mach 1 is supposed to have a rubber bumper is a quack. they have chrome front and rear bumpers. also, is it a fastback? if so, then the tag is almost surely off of a different car. the 351w was offered with a C4, it was just rarer (i think). check the other spots where a vin is located: not sure if there's one one on the fender apron on the '69 but there is (at least on the driver's side) on the '70 and see if it matches the one on the dash. also it should have been pretty obvious as to whether it was a mach 1 or not right off the bat when you bought it if it was a hard top or not. if you're not sure what the difference between a fastback (sport roof) and hard top is, a hard top has about a 120 or 130 degree made by the rear window and the top of the car and a fastback has more of a sloping, sexy look. -eli
__________________ 1970 Calypso Coral Mach 1 Mustang
351 Windsor, RamAir, Dual 40 Delta Flowmasters, camshaft, bored 040, performance pistons, holley 550 2-barrell carb, Pertronix electronic ignition, Pertronix Flamethrower 60,000 volt coil, Pertronix Flamethrower wires, Radial A/T's. Hoping for the PERFORMER 351-W Edelbrock intake manifold and a 650 cfm Thunder/Performer Edelbrock carb. | 
real mach1??? 
