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I tried to search on this site for an answer, and I've googled it a bunch of times, but I can't seem to find the part number for this specific valve. I'm not sure if it's from the 74 302 that someone put in this truck, if it's an original from the 64 flareside it's in or if it's from some other vehicle.
Note the threads on the inlet or outlet (not sure which yet, but it's the connection on the right side in the picture, going to the heater core).
You can search the forums on that number to read some other posts. It looks correct to me.
However, check that connection again. Most of the gold/red/blue nut looking ends for the stainless braided stuff is just for looks. A cap that covers a typical clamp. I suspect both sides had the cap and the lower left is just missing it.
Let me know if that didn't make sense and I'll try to clarify my thought.
This is fuel line, but same deal as far as the ends go. Look at it real close and, while this is an improved design from years past, you can probably see the built-in clamps.
See if you can open the attached PDF file. It's Illustration Section 184 Page 8. Your valve is the 18495 where the black lines representing the heater hoses converge. Hopefully you can zoom in and see it.
So do I have to buy the whole assembly? My bracket is still good. Plus, these things are hard to find! I saw a thread with ND on it from 2011 and ND, you said there were 11 left then. Chances are there aren't any now. <sigh>
Here's one on eBay. The seller needs to put on his spectacles because the box says B8C-18495-A not B8C-18455-A as mentioned in his ad. You *might* find one for less, but $20 plus shipping doesn't seem too bad. The bracket seems integral with the valve, to me anyway.
I searched on YG-134 to find this one. That's the Motorcraft number.
This is fuel line, but same deal as far as the ends go. Look at it real close and, while this is an improved design from years past, you can probably see the built-in clamps.