rust and rot around windshield

[travz500]

can the rust and rot around the front windshield lip and on the inside of the cab be fixed? I have 4 different trucks just bought a 64 GMC 2 ton for cab eventhough its GMC and it was rusted out the rest of the cab is in great shape and i got a65 chevy that the rest of the cab is decent and fixable but the windshield lip is toast got holes in it inside and out what can i do besides keep lookin for a decent cab going to look at a 64 2 ton been sitting inside and hasnt moved for 25 years he said and from pics it looks good and also a 66 pickup hasnt moved for years so hope i can get something good seems its gonna take 10 trucks to make one