I got 3 carbs, all from 86's .. (2wh/auto..2wh/manual...4wh manual) ...can anybody confirm for me if there is a difference between Hitatchi carbs of a 2wh vs 4wh drive...I am looking for the best mileage to be gotten when I am on the highway

yes, it's usually a matter of jets

disty vac advance curves are different.

Often times the wiring harness on the carb is different too. My 87 used to be a 3 wire system harness. I bought a 2WD carb for it many years ago cause the original one crapped out. It as a 4 wire system so I had to adapt it to be 3 wire.

 

So ya the carbs are different. I got awful mileage with the 4 wire carb converted to 3 wire so careful what you do.

 

I later changed to a weber. More power AND better mileage!

would you know which carb has the smaller jets or info as to find out

yes, it's usually a matter of jets

yes, they are listed in the haynes manual

 

 

I can LOOK if needed