Ive seen fuel tank hole block off plugs on 62-79 F-600 and up big fords. I just removed the in-cab tank on my 77 and am looking for one of those rubber tank hole block off plugs. Don't want to weld it shut, in case I decide I want to put the tank back in. Where would I find something like this?

Thanks.

 

I have seen those too, I don't believe they are specifically intended for that use, but rather are just a generic rubber plug.

 

hail_destoyer, did you find a solution for this?

Did you find a plug like flatbedfordguy suggested?