Raprap, I'd also be glad for any info you can share, on the short pump and fan. I'm also working on a 292 in a '40 coupe. I deepened the recess in my firewall but could still use a little more room behind the rad. Just bought a NOS '65-'74 GM 292 water pump off ebay, the sucker's 3/4" longer than what was on the motor. Regarding the left side heater outlet, the heater hose connection on the pump is really an inlet, no?
And as for jpegs, why not put them up on a free hosting site like photobucket and post a link here? I for one would sure like to see your setup, this is what mine looked like before I added a Fluidampr and started working on a serpentine belt setup:
http://i23.photobucket.com/albums/b386/erjack/a7fbadb4.jpg Edit: As LeeLites says, the 292 pump is different from the 230-250. It has an external bypass, larger impeller and larger internal cavity. The 230-250 pump has a small hole on the passenger's side of the casting that matches a similar hole in the block, affording a little circulation before the thermostat opens.