I completely agree with you, Denny
Jim Carter's website is useless for searching.
This is sad, because they have the widest selection of parts, and their customer service people are among the best.
Chevs of the 40s used to have a very friendly/logical interface - no more. Their customer service people are usually good.
Even Classic (Truck) Parts (Chevy Duty) does not provide a URL-link for the result of a general multi-result search (their search feature is very good, however). Their customer service people are usually good.
American Classic Truck Parts is good, but it seems to take a few extra steps to get to part (compared to Classic Parts). I usually do not link to them because their pictures and descriptions are not as helpful as the other vendors listed above.
Nonetheless, the competition is good and that benefits all of us.
Many of us have different needs and preferences - that is also good for competition that benefits all of us.