Post the codes you find at the locations shown on this page.They should help you/us ID your head and block.
The engine serial number is the easiest code to find.
The head casting code and the head date casting code are relatively easy to find/see on an engine still in the truck (you might have to remove the valve cover - bring a screwdriver).
Also, bring a small wire brush, in case there is a lot of grease on the block/head that need to be removed.
