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.
Try driving a similarly equipped truck if you can before picking a very fast OD ratio.
In my experience 0.8 OD ratio (or less) is very comfortable, you can run along in direct or OD at the same road speed without extremes of RPM in either gear. Nice for hills because its comfortable to run either gear as needed.
You don't always get your pick of OD ratios if axle gear choices are limited, sometimes you need more OD just to get the final numbers to work, then getting between 4th and OD is a compromise.
