Quote:
Originally Posted by Jim/GA
No! No teflon tape on the fuel system lines! 
The fuel line inside the car (from fuel valve to fuel bowl) uses a tapered tubing end that mates up to a tapered fitting on the fuel bowl. Snug it up and it should not leak. The threads only pull the tapered tubing up against the tapered fitting tighter. The threads themselves do not seal, so there is no need for sealant or tape on them.
While you are in there, replace the fuel line also. You can apply a very light coating of a non-hardening sealant, like Permatex #2, to the tapered fitting before attaching the tubing, if you want, as insurance against a weeping fitting.  But you really don't need it.
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Hi Jim,
As long as you are careful and do not get shards of the yellow tape in the gas, what is the objection to the yellow gas resistant tape?
I understand the fix it right the 1st time approach, sometimes a person has reasons to try to make the old stuff work.