Some of the lines on my O'Day 28 (Universal M12) have been replaced but not the ones from the tank petcock to the fuel pump or the one into the engine. Both are factory swaged fittings. It seems sensible to replace these with a barb fittings. In my case the barb end would be for 1/4" ID fuel line, but does anyone know what the thread on the petcock and the engine end might be, both diameter and if NPT or other etc. and finally, best place to buy such as West, NAPA etc.? Knowing will save me two trips into the "hell hole".