You know, I'd have to crawl under the truck to get the exact model number, but it's one of these:
http://www.holley.com/types/Electric...Carbureted.asp
The Holley blue 110gph, I think. I really wanted to go with Edelbrock (busted 3 of them before I mounted it right; oops), but was swayed by the auto parts store guy saying that these were more reliable, not to mention, a lot cheaper. They're also easier to rebuild/maintain/take apart, if necessary.
Their only downfall, however, is noise. They are noisy. You can hear it buzzing away quite audibly even when the truck is idling (not driving), but so far it's been decent. It's a lot cheaper than Edelbrock.
Just remember to get a fuel pressure regulator when you go electric, and put it close to the carburetor (in the engine bay).