They had a 6600gvw version (6800 for 4x4) that came with the 300. Later they made that truck only available in 2wd regular cab form.

The 8800gvw F-250 has been around and later was made std with the 351.

The F-450 (superduty) came out in 1988, came std with a 460.

Ford also made a "SuperDuty" series of motors in the 60's?


1993 F-150
1989 F-150 4x4

(http://briefcase.yahoo.com/toydestroyer1)