I was never a fan of the do it yourself at home, fittings, I had one on my hydraulic clutch line and I suppose it did OK, but one day I accidentally snagged the line and it pulled right out. now I only use crimped fittings...much more secure!

if you wanted to run a long line for fuel, the at home fittings will probably be fine, since fuel never sees high pressure. summit and jegs both have stainless line in bulk and the fittings for each end will be around $8 each.

I bought a 25' roll of aluminum 3/8 fuel line for about $20 or so. kinda hard to beat, especially since the majority of the line is under the vehicle where no one will see it but you when you're working on it.