Yes. First off Welcome, You were right to replace the distributor and you will need to adjust the ignition timing. It is fairly simple but you'll need access to a timing light. You can pick up an uber cheap model here or probably get a loaner from a parts store.

Good How-to on setting ignition timing (Check the label under the hood for the spec timing and idle speed values)

Or you can search this site for more info. Tip: I'd use the search term 'BTDC' instead of 'timing' to skip over the hundreds of thousands of timing belt posts. Also, don't know if you've already done them or not but those spark plugs are going to be ripe for changing at that mileage and worn plugs can have quite an impact in idle. Lastly, use the search tool again to learn all about the knock sensors used on the trucks, their inevitable failure, what a PITA they are to change and that they really don't do anything on the normally aspirated models so most of us just leave them broke (myself included)

-Saturday