replacing/upgrading heater hoses

[87MJJeep]

I need to replace some heater hoses. One of the two that run along the valve cover has the AMC logo! As faded as it looks, I imagine it's original.

 

For now I'll stick with having a stock closed system. It is feasible or advisable to cut the hoses off the metal pipes where they are currently crimped on? Can I cut them off with a Dremel or other tool without ruining the pipe? Or is buying a replacement pipe with integrated hoses recommended?

 

I've read where some ditch the Heater Control Valve. What effect does that have on the heater operation if I ditch it?

 

Too many black noodles under the hood...

 

[Eagle]

Cut 'em off. Dremel will work, so will a hacksaw.