The hoses do tend to "mold themselves" to the tank after so many years, they are plastic connections too. I'd do the hoses as well, as when they are disconnected they tend not to fit on new parts so well.

Which is why many of us tend to do our cooling systems in waves as a whole i guess

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards