My original cab was in need of major surgery like you. I decided it would be a lot cheaper to get a donor cab and found one for $500 that was straight, no holes, no rust... Even in if you pay $1,000 for the cab you are going to save lots of money and time. From the list of sheet metal you gave, the price of just the patch panels is more than a good used cab would be.

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi