define "a little too far".. if its a compression adaptor like ive seen, it has a quick disconnect in place? maybe you can remove that to get yourself a little extra room, or if you only need a fraction of an inch, maybe finding a stubby elbow at a plumbing store or grinding the existing one down a bit, or fully threading the compression adaptor in to give you an extra inch before screwing on the elbow and hose to the gauge.. without being in your situation id unno what you have already done, but maybe some of my suggestions can help you.

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Matt
2003 Jetta Wagon TDI 145,000MI
1999.5 Jetta TDI 287,000MI
2001 Suzuki SV650S 26,000MI
2008 Yamaha Vino 125 11,000MI
http://www.crazymatt.org