After a little bit of internet research - I found a 545 on Ebay for $400. It had the PTO provision and had the dimensions as being 27" long. That doesn't seem much bigger than the 465 would be. Am I wrong? And Dave, what do you think the PTO adapter and set up would run me?

1937 Chevy (converted to 4x4)
1942 Chevy G506 1.5 ton 4x4
1958 Mack B model (on Chevy 1 ton 4x4 frame)
1969 Dodge Charger
1987 K30 Crewcab