they are all about the same if you stick with the name brands. there is a seller on ebay fassterllc that has some more affordable stuff at good prices.I need to install a fuel press reg. What an fittings are the best, areoquip , russel , earls etc. Thanks
I can't speak to fuel vapor being more pronounced in metal vs. rubber fuel linesI recently bought a used carb that came with AN fittings and line for duel feed and a main line. I took it all off and ran rubber hose. The AN fittings had too much metal and extra volume of fuel it held. With all the boiling fuel problems I've had in the past, it's a no go on my car.
Aluminum conducts heat much better than rubber. Plus the T fitting was a big long piece. If vapor does occur, if it's a large volume there is more of a chance of the fuel bowl not having enough time to purge itself via the needle and seat and the vent tube. Millions and millions of cars were built with rubber fuel lines and millions still are.I can't speak to fuel vapor being more pronounced in metal vs. rubber fuel lines
however very few GM factory engines came with rubber fuel lines. Further they used brass or steel fittings/lines and not aluminum. Maybe its just me but the risk of fire with rubber seems greater so I'm a steel fuel line guy.
AN or Army Navy, I believe is a mil spec aviation standard from WW2. If the fittings are true AN they must meet this specification... Al