I had to remove the banjo bolt on fuel filter housing outlet (leading to the IP), and even though I had two rags stuffed tightly in the space around and below the fuel filter, enough fuel came out to fully soak those rags...

Is there a way to relief pressure in the fuel system before opening it up to avoid this mess? Would it be better to unscrew the fuel filter first maybe?

Another question: I am planning to hook up a gauge at the fuel filter housing outlet, and the gauge uses NPT fittings... Do those seal ok on their own, or if not, should I use teflon tape or some kind of a sealant on those brass fittings?

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84 300SD - bought in April '06 with 237,000 mi