In article m, Ken Sterling
says...

Don't think I'd try drilling it out if there is fuel in there - as
when the drill bit breaks through, the fuel will be coming down the
flutes of the bit and down onto the drillmotor - sparking- etc....

1) remove tank from vehicle.

2) invert, drain out fuel residue.

3) fill with water, drill out plug.

Done.

Jim

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