Coyote Jack,
Correct on the 'bulk'.
They list the 1972 Mustang 'Mach 1' Fastback with the '351 HO'.
* Shipping Weight....... #3330 lbs.
* Front....................... 57.9% {#1925 lbs.}
* Rear........................ 42.1% {#1405 lbs.}
* Curb Weight............ #3481 lbs.