Stuck water pump

[EccentricMagpies]

'74 360 car

I just started the car for the first time since it was Dyno'd .. maybe 3 years now.  The car will run and idle, yes has oil, but the blade does not turn.
http://www.dodgecharger.com/forum/index.php/topic,112628.0.html

the belt seemed tight on the alternator but I can't imagine this as any issue.

is this obviously bad water pump issue?   I would have thought this water pump was the one used during the dyno of the motor.. but it's been too long for me to remember that detail when I picked the motor up.

Wonder if there might be some other simple solution?
Thanks,

[EccentricMagpies]

Never mind.  Didn't notice the belt slipping w the open headers

[c00nhunterjoe]

I like easy fixes