Look in this link. Your carb number isn’t listed But you should be able to find a truck or van close to how your truck is set up. The jet sizes will be close to what you have.
http://www.digitalcorvettes.com/foru...ad.php?t=88376
There’s likely some info there to determine how to measure jet sizes.
Look here to buy some jets to experiment with.
https://quadrajetparts.com/bulk-pack...ets-p-732.html