True. It's also worth considering what decades of upgrades and custom work have done with the suspension of trucks of this era. A common approach is to discard the entire original Fargo frame and chassis, placing the cab and box on the chassis of a newer (but still old) compact to mid-sized pickup (historically, that's typically a Chevrolet S-10); that still gives you a lousy rear suspension, but this approach might be useful for the front suspension and front part of the frame, if doing a rear-wheel-drive or 4WD conversion. Replacing just the leaf-sprung beam axle of an old truck like this with a modern independent pickup truck suspension is a common "street rod" / "hot rod" modification.Also, you need to think about the modern, refined suspension and braking systems of the Leaf compared the primitive, harsh ridding existing systems in the Fargo.
Any pickup front suspension may not be viable if using the Leaf drive unit as-is to drive the front wheels, because there may not be enough width available for the transverse drive unit.