A early 90's Ford f-150 with 300 inline six EFI can go as long as 300k miles when taken care of. The 300cui in those was used for many years starting in the late 60's know as a torque monster and still used in a lot of trucks today UPS big brown just for example.
They can take a beating while giving good MPG.
Only other 90's truck i would have is a is the small 87-95 pickup with the 22r-22re engine. They are small but can give some good power with awesome reliability. My father had one beat on for may years and had over 320,000 miles on original motor and tranny.