Thanks to all who responded.
I will start reading those websites.
The truck in question was my wife's dad's truck. We sold the truck when he passed away in 2002. Had 54k on it at the time. Now has 212k. Still looks good and drives well. Needs tires and a timing chain set.
It had an electric winch for loading a handicap scooter. We kept that. Three bolts and a new wire to the battery and that can be restored.
Serious gas hogg. Carburated 351. The original Holly was swapped out for an Edelbrock a few years ago. I am told it gets about 15 mpg now.