Worked with one of those in the Army as an ambulance....yeah at 55 mph, the engine was singing...saw one that was sold to one of the Guard Members when I was with the MN Guard at the St Paul Airport...he put a 440 in it after he bought it... but also changed the axle gear ratio....
he got the idea from one old Power Wagon was on the show circuit in the Upper Midwest at the time, with a 426 Hemi in it...the guy couldn't afford the Hemi, but 440s out of Winnebagos were common and fairly cheap....
