My project is plumbed the same as UtahYork's.

Since the plumbing on the '46 1/2 tons had only one line heading to the rear and one line heading to the front, as John says, I think it would make sense to do the left rear first, then the right rear, followed by the left front and the right front last.

Nick
1940 KC Model 1/2 Ton Pickup Project
(with '37-'39 Bed and what we think is a '42-'46 Frame)
Taos, New Mexico