I have seen a factory 7 quart pan on a van once, 1989 318 high swirl. With a large oil filter, took two gallons of oil. But my moneys on the dipstick being wrong for the application. What year truck or van is that?
Truck or van? Actually neither. It is a piece of farm equipment dating back to around 1972. Original 318 engine replaced sometime in past 10 years with 318 dating to 1983, as per casting number on the block. Has no VIN, so is thought to be either a warranty engine or something Chrysler sold for generic use. Also has a 4 or 5 speed NP540 transmission that was apparently used in mid sized (2 ton size) trucks from that era. So probably sold to the outfit that built these things as a combination unit.
The intro thread I referenced has a photo of the monster in general. These are pictures of the engine as mounted.
Basically, think of it as being like a school bus chassis. Engine mounted in the middle between the rails. So in general, pretty easy to get to the front, back, sides and bottom, but not much room overhead. Engine serves two purposes. It propels the beast, but also runs a hydraulic pump off the front crankshaft. Hydraulic ump runs a couple hydraulic motors, including one for the fan for a remote mounted radiator, plus some lift cylinders.
Out of all the engines the guy who invented this thing could have used, he chose a Chrysler 318 to run it. Guy was pretty smart.