I saw a (built) 305 in a mud truck...that thing would scream.
If a little 6 will push it around, that 305 will. 700R4 is a good choice, also.
Performance and fuel mileage will depend on rear end ratio, carburation, tire size, etc.

cm

If you can't fix it with a hammer and screwdriver, you need a bigger hammer.
1965 Chevy C10