Thank you for the feedback guys (Wrench and Dave)...The fuel pump in the truck is an aftermarket 4149 job. I do have an old original AC fuel pump in the garage and I think I'm just going to try and swap it in and see if anything changes. It's old and might not be good, I've never ran it but i'll give her a go.
I checked your picture Dave (and the others, nice build!) and I also looked around the internet for pictures of those glass bowl filters on running inline trucks and I did see both full and not so full, but more seemed to be on the full side.
I figure it's worth a shot since I have the part and it's a fairly quick job. I'll let you know if there is a difference.
