I'd be cautious of the very fast overdrive ratios, you may find the rpm drop between 4th and OD is a bit much.
If the difference between the gears is to much you end up winding it out further in 4th than desired. Or when down shifting from OD back to 4th to pull a hill you (choose to) loose road speed because RPM in 4th is then higher than desirable.
Depending on the application even 0.73 can feel like a stretch.
Being this is my first project I'm sure there wil be a lot of trial and error. I wont really know until I have all the details ironed out. I need to figure out what my rear gear ratio is first to see if its something I may use. The transmission I have is a 3 speed. I appreciate all the perspectives and suggestions. I glad to see that there are many options.
