a resto-mod of a [pick your favorite] with a modern drivetrain, complete with suspension, [floor pan swap ?] would be the very best of both worlds, but would be way above the average guy's abilities and disposable income because of the complexities of such a swap.
also, one should be wary of one with the "hard work already done for you, only needing a few other small things done to complete". was this quality work, or just a "stab in and get running" deal ?
however, installing just the gen 3 engine and transmission is child's play anymore, with installation kits and wiring harnesses being readily available, and being somewhat realistically priced as well.
but paint and materials have skyrocketed in recent years, as well as the labor rate to do quality work. same with upholstery work. not to say a guy could not do this at home, but once again, these skills are far and above what the average joe possesses.
it boils down to the old "if you wants to play, you gots to pay" saying.
so what will it be ? a new school ride or a resto-mod ? how much do you "wants to pay to play ?"
no wonder the "rat rod/rat muscle" phenomenon is so popular these days. a ton of money saved, but having fun anyway, ala roadkill...........
just a babbling old man's opinion, who was lucky to have bought a charger CHEAP way back when they were just cars, and has been fortunate to have kept it all these years, and having fun with it again for CHEAP because he hung on to it.
your mileage will vary.