Modern Drivetrain Swap

IMO, if you want to put an LS into your classic Mopar, that's your business. Do what you want with your car.
However, IMO, you lose your Mopar Man credential. You just can't say you're a Mopar guy or gal if your Dart, Challenger, RoadRunner or what ever, has a non Mopar engine in it.
Sure an LS swap may be cheaper at the very simplest level, but if you are all about cheap and easy etc, you should just hit the easy button and build a Chevy.

Furthermore, this is, infact, the New Hemi Swap section of the forum. If you want to argue the merits of a gm engine swap in a Mopar, do it in the general discussion section.