I have read through some of the posts on here and found that some people have a hard time finding the correct gas cap. I found a FRAM that is a direct replacement. FRAM RG-800. I didn't try it but I also believe the replacement locking cap would be the FRAM RG-792.
I also found and just finished installing a brand new replacement fuel tank sending unit that works great. It took some modification to adapt to my pick-up unit. If anyone is interested I was thinking of putting up a post with all the information. I am just back into the club recently so not sure if this is the correct place to post this. Thanks