I can't comment on the ability to mate the ranger to the 4 speed, but if you do, there is nothing wrong with not using every possible ratio every time you accelerate. I rarely use all the ones I have under my arm in my '46.
You'll find that there will be a combination of about 3 to 5 shifts that will get you moving to highway speeds from a stop in normal conditions with most loads, much as you already have with perhaps a little better top end speed. The rest of the 16 total combinations will be for "fun" if you can manage to memorize the sequential pattern and get coordinated enough to move the 3 controls in concert. (Offer someone a ride and hit them all in order on the way up the street and see what kind of goofy reactions you can get-I find this to at least be as entertaining as a mediocre B movie) There is a good chance though that the spacing between the 16 possible speeds will not be even, and some might even be so close together as to be effectively the same as mentioned above.
At least, you'll have a gear near the one you're in for pulling a hill or passing, or while pulling into a parking spot at 3 mph and 3500 rpm to create a scene at the grocery store.
