I put a later model oem tank behind the axle of my truck. The fill inlet size is 2" I plan to cut a hole in my fender and run the fill up towards the rear. I want to connect the stock filler neck (1-1/4") to the fuel tank with some fuel fill hose through the bedside just under where the bed wood will eventually go. Its a relatively straight run. I just need to know the best way to adapt from the 1-1/4" neck to the 2" tank fill. I am new at this and would love your advice and opinions! Thanks!
Find a filler from a newer truck with a bigger tube size. Or get out the torch, and weld a "washer" and a piece of 2" tube to the original fill neck. Might look at exhaust pipe tube adapters, but probably won't find one that small.
These guys have what you need more than likely. I just did the same on my roadster PU. Went from 2.25" down to 2", with their adapter. They shipped out real quick. http://www.fillernecksupply.com/servlet/StoreFront
I just went down to my local muffer shop and they expanded a pipe to fit,,$10.00 if I remember right and included a bend to fit.
I'd get to the 2" size as quickly as possible. To me there is nothing more aggravating than a slow fill pipe due to reducers. A muffler shop can make a fill pipe to your specs without a problem. All you really need is a short piece of the original fill tube with cap locking end. I hate automatic pumps constantly shutting off the pump waiting for a burp. I don't think 1 1/4" is large enough for a fill pipe. No, a muffler shop will not have 1 1/4 pipe.
Now this is great advice, I hadn't even considered cutting the end off before it necks down. I think I can weld on a parts store 90 exhaust tubing and some rubber hose and I'm set. Thanks everyone!
look inside the filler neck, it has a piece of small tube extending up inside, if it's like the ones on my later 50s Chevy trucks. There's also a smaller vent tube to let the tank breathe out as fuel goes in.
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