[68c10owner]

I`m thinking about trying to get this old pu from a friend and I was wondering what the biggest tire I could fit in the rear was? I don`t want to cut the frame but I don`t mind tubbing the bed. It would end up with a ladder bar or 4 link set up so I guess I really just need to know how much room is from the frame to the outer wheel well? The truck is in a different town so I can`t just go over and measure it. Thanks.