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Message: [QUOTE="old man dave, post: 1227553, member: 1009"] 2) You can run 3/8" line if you modify or buy a modified fuel rail plug. If you buy one then it has an 06-AN tit on it so you can attach a AN-06 female hose fitting to it. Diesel Innovations sells the adapted fuel rail fitting. You need one for each head for the supply side fuel connection. The internal size of the fuel rail through the head is over 7/16" diameter. Its more limited by how much you can bore the fuel rail fitting. If you make it, then bore a hole through the fuel rail plug. Then get a AN-06 male fitting to a 1/4" NPT fitting and cut off the NPT end. Then braze the AN-06 part to the bored fuel rail fitting. Drill the hole in the AN section to match the bore size through the fuel rail plug. Probably done easiest using a lathe so everything is concentric. Aeroquip makes the close radius bend fittings that clear the firewall, the wide sweep bends do not clear the firewall. I used the red/metal colored steel ones since the aluminum ones tend to crush when tightening in the confined space between the head and the firewall. Aeroquip also seems to have the largest internal bore size compared to the other brand's AN fittings. Russel is close, Earl's is the worst. Summit Racing has them except they special ordered the steel fittings for me. Swamps does not reccomend using the cast 90* fittings because they do not flow as well as the bend fittings of the same size. [/QUOTE]

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