How is '54 Yblock (239) water pump different than all later ones?

[JimNNN]

If I had a 54 that I was going to keep, I would keep my eyes open for replacement parts that I didn't even need and buy them for later when I need it and can't find it.

That's what this water pump is. I would get an extra fuel pump, too, but I couldn't find one 15 years ago when I needed a replacement, so I had mine rebuilt. Regardless of what others say the later ones won't work for my original '54 motor...I know, I tried. Maybe they changed fuel pump design mid year or something. I don't know if the oil pumps are the same or not. Any year specific part is worth having.



It would even be fun to rebuild an extra 239 engine for a spare...but that's going a bit overboard.