[TR] Gas smell

[Dave Connitt]

So now I have a running TR4A in the garage and there is a gas smell who's
source is driving me crazy. No visible leaks anywhere. The carburetor bodies
are dry.. I don't have air cleaners on in yet but I don't think that could be
the source. The filler cap gasket is looking pretty rough but it feels like it
is sealing.
Does anybody have any ideas?
Thanks,
Dave Connitt
'67 TR4A IRS