Truck fuel neck hose
 

The fuel neck hose on my 83 Chevy C20 w/dual tanks is split and I am having trouble finding a replacement. It looks like a radiator hose and makes a 90 deg bend.

It looks like they might have it here: http://www.lmctruck.com/icatalog/cc/full.aspx?Page=134

Radiator hose will slowly destruct with gas, with ethanol added it would probably disintegrate even faster.

Try your local auto parts store. My local Federated auto parts store keeps it in bulk and sells it by the foot.

x2. I've bought it at my local Carquest for equipment at work.

I don't believe straight pieces are going to make a tight ninety degree bend that those tanks require. Twenty bucks for the correct part is not out of line, IMO.

Friend used a radiator hose as a fuel filler neck on a 36 Chevy he built years ago. After using it awhile, it became rock hard.