short h2o pump vs. long pump

[whitesswj]

I'm gettign closer and closer to getting the new bored 60 350 running and i'm fighting the h2o pump issue.

I'm really leaning toward a long shaft one. But whats the advantage - if any.
How can i find one at the parts store (what do i ask for) b/c i've asked for the long pump and i get that deer w/ headlights in eyes comming at 75 look.

I'm putting electric fans on the rad.

and i can't find a harmonic balancer w/ grooves at autozone or ebay. (if you can help for cheap let me know)

Thanks, sswj