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Heater Hose Question - SB With Short Water Pump

5801 Views 9 Replies 5 Participants Last post by  elco68
Guys, I'm swapping a 350 into my 64 C10 pickup. I have a short water pump, and all of the associated brackets and pulleys are installed. The only problem I have is with the heater hoses. The truck has two hoses, one 3/4" and one 5/8". The 5/8" hose I have connected to a fitting on the intake manifold, no problem. The 3/4" hose, however, is supposed to go to the water pump as far as I know. The only fitting I can find with a nipple big enough for a 3/4" hose won't screw into the water pump. The threads are right, but the threaded hole in the pump is so close to the casting of the pump that you can only screw in about two threads before the hex portion of the fitting bottoms out against the pump casting. Is there some special sort of fitting required for a short water pump? I feel like I must be missing something.
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I have grown to hate the early small block accesories set up for reasons such as this. Setting up headers can be a challenge too. Most small block short sytle water pumps have a fitting at the top. A simple fix can be made with cast iron plumbing parts.

Use a 3/4" threaded adapter (threads at both sides) and install this piece into the top outlet. Then install a 3/4" x 1/2" 90 degree elbow to the adapter and finish with a 1/2" piece that is 2 1/2" long and exiting to the passenger side.

Mount the elbow flush with the water pump and paint to match (requires trimming the 3/4" adapter to fit). The 5/8" hose will slide over the 1/2" pipe threaded section and exit cleanly to the passenger side where the hose is routed to.

All these pieces can be found at a hardware store for about $2.50. Not factory, but a neat install. Some may call this ******* but it is a cheap fix. If you want show quality, these parts are available in stainless steel from a few differant companies found on the internet.

Good Luck!! :D
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