Paul --

That is a good idea, one I think I may try this weekend (of course, that means I have to put the alternator belt on, which means I'll find out for certain whether I wired it correctly or not...)

Rivercatt --

I did install a factory Isuzu primer pump assembly, however it is not at the highest point in the fuel system. Since making it so would require lots of new line to be run, I think I'll try the vacuum trick first. A good point nonetheless. Also, I think my primer pump isn't working - I get bubbles in the prefilter (inline, before the main fuel filter @ the hand pump) when pressing on it, which seems wrong to me. I did find another used pump but haven't installed it yet. And yes, I followed the stamped flow directional arrows when I hooked it up!

Thanks for the advice, all.