A true Mach1 or a fast back Stang?

[Speedrx]

The Sportsroof will have an "02" as the 3rd and 4th digits in the VIN while the MACH will have an "05".

All MACH's are Sportsroofs but not all Sportroofs are MACH's.

[copo9566aa]

The 05 code for Mach 1 in the VIN start in 1970.
in 1969 the code 02 is for all sportsroof
Sportsroof standard GT and Mach 1........

1970 MUSTANG MACH1 REGISTRY

[442w30]

Not quite.

The fastback was one of 3 available bodystyles for the Mustang. They marketed it as the SportsRoof.

The Mach I was only available as a SportsRoof.

The GT was available on any bodystyle. There is no "standard" bodystyle.

All engines save the Boss engines were available on all bodystyles. Smart people ordered the 428CJ in the coupe, but they probably only made around 50 of them. Non-Mach I fastbacks with the CJ are also extremely rare, and if you're gonna encroach into Ford territory, I'd suggest checking out these sleepers.

[Pantera]

One of my old drinking buddies here in town still drives his med blue sportroof v-8 3 speed Mustang every day. Bought it new. doubt you could pry him out of it. He will be buried in the dam thing I suppose.

[D.Layman]

Yes, I agree.. As it turns out, Stock 351 4V Mach 1's were pretty much dogs in terms of actual performance.
16 second "avg" 1/4 mile times with a few mid 15's (whoop-de-doo) every once in a blue moon... 0-60 was a miserable 8.2 seconds...

The stock 71 Z28 smoked those times...