Should I do it??

If the Cuda is a nice driver you will probably regret selling it.

No matter how much money and work you put into it it will never be the driver the Challenger is. If you are buying the Challenger as a driver it is probably be a good deal at 25k + cuda since it is supercharged.

I have driven a supercharged SRT Hurst Challenger, would love to have one, WHAT A RIDE.

You could put a 5.7 or 6.1 in the cuda, coil over tube front suspension, 4 link rear. Classic air, power windows and some other creature comforts. Then you could get the 25 mpg, but you would still have an old car.

Good Luck with your decision