I'm almost 100% sure that all the trucks pictured have 6" lifts and 37" tires. Their are all configurations of SRW trucks (Quad, Mega, LWB, SWB), so some just look a litte taller. Additionally, some of the trucks have 20" wheels, and some 17". Many of the trucks (the gray quad cab, the red and white megacabs, and the long bed truck) are ones posted on ebay by the seller wattsautomotive. They are a car lot in Utah that often has new or slightly used lifted dodge trucks (nearly all with 6" lifts and Toyo's). The lift on the red truck is a 6" Tuff Country, but it seems like they use another brand as well... just can't think of it right now. The black mega is TDR member Fozzy. I forgot whose the blue one is. Yeah, I really like the 6" lift/37" tire combo myself. My favorite is the gray quad, followed by Fozzy's black mega.
As far as my fuel system... I am very pleased with Glacier Diesel Products. They are great to work with, and go out of their way for customer support. I have the 2-micron fuel filter and big line kit installed. I don't have the walbro pump on yet (long story). Again, I'm very happy with the quality and service. Tomeygun has the full GDP 392 system installed and gives it very high marks as well.
Maybe one day soon I'll be able to post a picture of mine with some 37's on it! --Eric