On the same subject, but not specifically...
Could you use a smaller amperage sub-panel since you're not really loading it up all that much? It might save you some green.
I wouldn't worry so much about it if I were you. My garage ceiling is around 8 feet high, and I was able to build shallow lumber rack above it that will hold the equivalent of 18 2x4's.
How much space is between your ceiling and the door? Maybe you could just close the gap to make it more...
I didn't check the SW site listed above, but here's what I've done in the past, and it always works out for me. (Worked in a paint store and painted for a living for a few months in my youth.) Calculate the total square footage of what you're painting and divide by 300 for primer (lays a...
http://www.rockauto.com/en/moreinfo.php?pk=2603376&cc=1441671&jsn=522
I randomly went to rockauto.com, picked Ford, 2008, Explorer, and fuel cutoff solenoid (under electrical connectors), and it looks an awful lot like what you posted.
I bought that one last summer so I could rebuild the front suspension of my Ford Ranger. It works like a champ! Don't expect to be able to pick it up an carry it around, though. :D