this article should be a good start. not from our site, but found via Google.
www.motortrend.com
a decent running, 200k mile truck hemi might be a great start and save you doing a lot of parts chasing down the road. if its not to be a daily driver, then I think it would work well for the remainder of its life or at least until the details of the swap are worked out enough to consider another, new or newer engine.
my two cents.
CJ

Hemi Engine Swap Guide - 5.7L and 6.1L Hemis For Early Mopars - Car Craft Magazine
In this Hemi engine swap guide we explain everyhting you need to know to install a late-model 5.7L or 6.1L Hemi engine into your early Mopar car - Car Craft Magazine
a decent running, 200k mile truck hemi might be a great start and save you doing a lot of parts chasing down the road. if its not to be a daily driver, then I think it would work well for the remainder of its life or at least until the details of the swap are worked out enough to consider another, new or newer engine.
my two cents.
CJ