Got the heater box out last week, easily an inch of mouse crap throughout the thing. Washed it out thoroughly, cleaned and lubed the cables, tested the fan motor, put a new heater core in, re-assembled it and back in. Found a good (hopefully) used radiator and shroud from a 73 340 4 spd car. Finished up the plumbing, all new hoses, started filling the rad and the lower hose was leaking at the water pump inlet. Checked the clamp, tried repositioning it lower on the inlet, still leaking. I can't see anywhere else that it could leak from, water pump housing was dry, plus it appeard the water was going up from the end of the lower rad hose. Took the hose off, checked for burrs on the pump housing, it's clean, as is the inside of the hose. Tried it one more time, still leaked, so I took the hose off and bought another one on Monday, haven't got it installed yet. Next up is rebuild the carb, re-install the MSD box, and tackle the interior, there wasn't much there when I bought the car, have found some parts and will likely use what I have for now at least get it running.