Hey La Crosse, thanks for posting all of those pictures! I am restoring a 66 GMC and will soon be swapping in a front crossmember out of a '82 3/4 ton and a 14 bolt ff axle. I also have been wondering about replacement water pumps for these engines. Has anyone tried Flow Kooler for a water pump? Their website is
www.flowcoolerwaterpumps.com Their site says that they can build a new impeller for a water pump that will flow better than the original.