LOL, Dude, if You didn't change the speedo gear, both for the change in tire diameter(???) and for the change
in gear ratio, Your calculations aren't even in the ball park! 2.93's will travel You over 21% farther than what Your odometer is showing based on 3.55's, so that's at least
12 MPG to start with, then what is the dia. of those badass lookin wheels & tires compared to the stock rollers? Any taller & You have more to add to Your actual MPG.
No, there's no Mopar gear between 2.76 and 3.23 except the 2.93's You're runnin' now,...and it wouldn't change much of anything MPG-wise.............
No, the closest thing You can get factory in an auto is a Lock-up 904,..........unless You find & buy the cast-iron adapter OE to put an LA V-8 trans behind a Slanty, then
an A500 is possible,.......but the drive shaft'd be about 6 inches!!!!
BTW, driving a really cool looking barn door is still, well a barn door!! Hard to get good MPG numbers with them on the highway!!!
