my first mopar, will i love it or hate it?

Welcome to FABO! Go big block..... A late model hemi is awsome in the dusters. There is info on the swap here. Engines can be pulled from wrecked donor cars. Get the reliability and mileage of the newer tech with plenty of available parts. There are EFI kits to even make the car look like its carb'd so you can get the old school look of a large chrome air filter..... All up to you and your budget.