All the O Rings we purchase, no matter the vendor, probably all come from China.
I just put in an order to McMaster-Carr for 2 bags of 50
O Rings size 111 Viton.
$9.58 pack of 50 X 2 = $19.16
$10.87 ship
$0.1.36 Tax
$31.39 total.
One of the above posts you were messing with the FSV. What was Ford thinking to put it behind the front of the forward tank on the Frame rail? I decided to move mine a foot forward 1/2 way between the tank and trans X mount.
There is a hole in the frame size of one of the bolts, bolted FSV on, rotated it to see how to line it up for the plug to clear things. Drill new hole and then you will have splice the nylon fuel lines.
These FSV are troublesome, been that way since these trucks were new. here is a YT Vid of a guy taking one apart, easy to do, I took 2 apart to see how they tick.
I used a small Diamond pointed bit on my Dremmel to take off the rivet heads, then punch them out.
One was a ford Part with their logo etc... made by Pollack. when I dissasembled it and pulled the motor and circuit boards, the motor is made in China.
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I haven`t taken the front with the nipples apart yet to see how the valve part works yet.
You are doing a great job getting the old girl up and running.
Goat