Should I make the swap to G3?

I bump up against this all the time. Part of the problem is I used to have a 2015 Challenger R/T 6M and know how it drove. The 5.7 was a great all around motor, only really needed a cam and exhaust to really shine but even stock it was far better than the carb'ed 360 in my Duster. The motor would happily cruise at 1400-1600 RPM on the highway and pull some good hills without having to down shift, returned 25 or so mpg on the highway and pulled well when I got on it. Really miss that car.

I've often thought that a stock Eagle 5.7 in my Duster (losing 600 +/- pounds) with similar gearing (T56/2.97/0.50 with 3.55 gears due to smaller tires) would be an absolute kick. Add a 6.4 cam and intake and it would be all (I think) I would ever need.

My opinion only, the big differences between an LA and a G3 (stock for stock) is - air, spark and fuel (wait...isn't that the formula for adding HP? :D ). All the G3's have heads that flow substantially more air than an OEM LA head. Even the pre-Eagle heads are at least equal to most of the aftermarket LA heads. Add consistent spark due to coil on plug and crank triggers to an EFI system that can more easily meet the target fuel over a broad range of RPM's and they just seem to run good all around. Now, if all 3 of those were updated on an LA motor (like you have), get's a little harder to say. Sounds like you have most of those advantages whittled away.

For me, I think I have decided to leave the LA 360 in the car and EFI it (some day). It's the numbers matching block and I don't want to store it somewhere and I think it will give me the performance I want (no big goals for me, just fun), and if it doesn't then I will look at changing things then. Bigger step is the T56 swap I am on the edge of pulling the trigger on.