There are several generations of frames all of which have advantages and disadvantages. Its best to start with a clear understanding of how you want to use the truck when its finished and then work from there to decide what frame would be best.

Frankly the easiest approach would be to find a stock '57 frame and put it back stock if you don't have a real good reason for changing it.

Even if you want IFS and IRS starting with a stock frame is going to be the easiest project.

Ignore '60 to '62 because they are unique and a reason to upgrade by themselves.

'63 to '70 are usually upgraded with '71 to '87 parts so why not start with a later one.

'71 and '72 have 5-lug disk brakes but '73 and later are enough better its common to upgrade the '71 and '72 to later parts.

'73 to '87 (and later in Suburbans and some others) are commonly used to upgrade earlier trucks.

'88 to '98 and '99 to current are different enough I can't really speak to them. The four-wheel versions are IFS and therefore not popular with swappers and the two-wheel versions are quite wide and I've not seen a swap done with one.

What about one of these is worth the work to swap it?

1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...