Back in the 1990s a computer tech living near Boston had pretty good results supercharging his V10 Dodge. He online name was Ramhack.

He later removed the supercharger but kept the 34 lb/hr injectors and reported that the 8L ran better with them.

I have always felt V10s needed a lower over drive top gear than 0.69 when running light.
This is the main reason they have gas hog reputations.

The SAE paper about the then new iron V10 bragged that it had better fuel economy than a GM 454 V8 at the same loads.

For those that have not read about it, "Maximum Bob" Lutz had his engineers build the V10 as an educational project to fully test out a new computer drafting/design/balancing program Chysler bought. Lutz admitted to Carroll Shelby that older Chrysler design V8s like 426 and 440 would have been updatable but he wanted to test out the new computer programs with a fresh and unusual V10.

0.69 overdrive is about right for a 5.2 V8
but 5.9s need about 0.6
and 8L need about 0.5 ratios.