Seems like for $5g you could ride out to MT's & grab a rust free cab. Panel replacement is not rocket surgery, I just did my 64's rockers,corners,floor etc. I thought rust free cabs didn't exist...they ARE out there-I bought one last week-a year too late but couldn't pass it up. Paid $500 for cab & doors.'64 C60 farm truck, shedded all its life. Still has all the drip rail sealer intact. I know yours is older but the 64 is still 40 years old, in amazing shape. Brian