I dunno where in GA you're at, but you will do yourself alot of good in getting away from that idiot "25 year ford tech", and finding someone that can post-mortem that engine and find out why it failed. I'd suspect that the shop that changed the timing chains reinstalled the chains in a manner that caused the nylon chain guides to wear excessively and clogged the oil pump pickup, thus killing the engine.
If you're close enough-you can trust these guys to take care of your truck:
Injected Engineering: Welcome to Injected Engineering
Aric and his crew are one of the beast shops in the country for work on modulars, and they're honest.
JL