Trying to determine what truck is worth

[fireman67]

I have been in search of information on approximately how much one of my Chevy's is worth.

It is a 1970 Chevy 1-Ton Dually
400 BB with a 4 speed manual tranny.
Body is in good condition. Doesn't have any rust where these normally end up with rust.
Has a wood bed that could/should be replaced. Not missing any wood just very very weathered.

Just trying to get a general idea of what a truck like this would be worth.
Surprised that Nada guides does not have any information for 1-ton trucks.