Not best, but optimum Transmission?

You should be at 2800 rpm @ 60mph with the 24" tires. Why not slap on some 26" tires and slow her down to 2600 rpm? Also, FYI, at these RPMs you are not "abusing" anything.
GTS - I've done various calculations, and they align with yours. I'm thinking my tachometer may be off. I have procured a new tach, but haven't installed it as yet due to time constraints and I've not found a means and location to mount it that I like.

As to why I don't slap bigger tires on there. I really like the look of the 14" Rallye wheels and tires, and the car sits somewhat low to the ground. The stance looks good, I do drag the TTi headers sometimes, even as gentle as I go over speedbumps trying not to.

I'm sure you're right, that 3,000 rpm is not abusing it … it just sounds that way. I have a Lexus LS 460L with an 8 speed. And at 60 mph, it's turning probably about 1,400 rpm. Apples and oranges I know. But, I sure love this MOPAR, so when it's spinning that fast for that long, it just sort of feels wrong.

But thanks for the input.20170827_142043.jpg