Call me an evil speculator, scroll down to Lot #312 in this auctions page for a '76 Chalet with what seems to be a mild lift kit (or maybe those tires make it look extra tall) but is otherwise stock:
http://www.raleighclassic.com/new/results.php
Considering what I saw at the recent Barrett-Jackson Auction for rather rare '70s cars, I'm thinking it's not economically wise to alter a good condition original.
Myself, I'll start over later with perhaps an early '80s 6.2 diesel Blazer with o.d. tranny, so at least I'll be ahead of the game already. From what I've seen, there is a somewhat steady stream of Chalets for sale where the Blazer underneath is too far rusted to save, and some are campers-only, long since separated from the Blazer and nobody knows where it is now....