Sorry to keep posting on this. I just installed a new water pump (housing and all) on my 74 pre-alpha. I'm assuming this is supposed to be water tight, so I hooked up the muffs to see if it leaked. WAter ran from the back of the housing toward where my shift knob is. I'm pretty sure it's coming from between the bottom housing and where the water comes in from the bottom of the outdrive. I've looked at all the diagrams and studied for hours to find the problem. My oil seals are in the bottom housing and the o-ring is in the groove on the bottom housing. Any idea on why it's still leaking? Maybe I'm being paranoid, but I definitely don't want to do any damage. Thanks for any advice.