[teryaki]

What would be the best gear ratio, in an 84' to get better highway miles? Got lots of power but no speed.

 

[redneckf150]

What kind of motor do you have? What kind of gearing does it have now? Have you priced the parts to change gear ratios? Is your transmission standard or automatic? Do you tow things?...if so what? Is it 2WD or 4WD?

If I had to give you an answer without the above-mentioned information, I would say 355.