the rubber hose for the fuel send line seems to be a little bit bigger than the return line. the (991954) 14 x 1.5mm male fitting used to connect to the factory rubber hose to the fuel line i created only fits the return line, but the send line end is just a LITTLE bit bigger. has anyone else experienced this? the 14 x 1.5mm bit is just a bit too small, i think i need to go one or two sizes bigger. if anyone's ever had this problem, please let me know how you fixed it. thanks in advance guys

 

I had same problem. The send line is slightly larger and is not a normal size. I went to a hot rod shop and they found a fitting for me. It was some sort of Holley fitting for carbs.

 

This might help you.

Here