Fuel Tank Inspection Cover Leak

I have an aluminum fuel tank which has about a 6-8" inspection cover made 
out of the same material.  The cover screws through a rubber type gasket 
and the screws are threaded into the tank material. One or two of the 
screws have stripped the threads and the tank weeps diesel primarily when 
it's completely full.  Basically I think that I have 2 options to repair 
this.

1) Redrill/tap with larger screws
2) JB Weld a nut on the inside.  

Any comments/suggestions?

-- Geoff
www.GeoffSchultz.org