[TR] water pump

[Gary Nafziger]

Are there several different water pumps for tr-3's or 4's?  I've just started
running/troubleshooting my tr-3 after a complete restoration and noticed that
the fan belt does not line up with the generator or crank pulley.  The water
pump seems to be forward at least a quarter or half inch.  It's very noticable
and I can't figure out how I put it on in the first place without noticing.
Anyway, I'm wondering if there are water pumps with different lengths between
the rotor and pulley?  Thanks

gary n.