Well, since everything else about the block is the same, then the cam will fit without trouble. The diference between the two cams is the valve event [the grind] As for the coolant pipe, just give it a few taps around the outer end with a SOFT hammer. Rawhide is probably best.

This pipe is a press fit in the block & you need to loosen it GENTLY. Once it starts to move, grab it with your hand[s] & gently work it out with small movements & a lot of pulling.
When you reinstall it, you may want to place a few stake marks in it to help hold it & use a suitable sealant. Make sure that you correctly align the extra water fitting otherwise the hose from the manifold will be either kinked, or stretched.
Drive it home firmly with the soft face hammer again to prevent damage to the pipe. When it comes to sealants, I like Cat red myself & that's what i used on mine 20 years ago. It has never moved or leaked since i refitted it.
[Cat red = Catarpillar liquid gasket. It's red in colour & available from all Catarpillar tractor agents.]