340 r.i.p.

It sounds like you are on a budget , so a motor from California or Florida will cost as much to ship as you want to spend total.
I have a 77 Dodge motorhome that is sitting in Duquette , Mn. right now.
360 and big Dana , 727 etc. Good tires and not too bad a condition given it's age. You could drive that home for 500.00 , pull the motor after you park it someplace where you could rent the body out to one of those gypsies who are trying to survive your oil boom.
From what I understand housing is going for , you should be able to get 4 to 5 hundred a month for that. :D
Or you could drive to St. Paul and give me more money for a very nice 70' 340 with some good parts and low miles. ( pulled for the R-3 / W-9 that will replace it )
Seriously , you do have options. My first choice in your shoes would be a used motor that I had some idea of the history on , or a relatively low mile motor from a wreck. Good luck.