The main problem with the 15 cwt or Chev quad kits are that they are nearly 40 years old. The parts are chunky, the detail a bit heavy handed and the moulds were never optimised so there are a thousand sink holes all over the place.
The Eduard etched set is really good and adds things that aren't in the kit like the wheel chocks that are up under the rear wheels.
There are also parts tha only a gnat could fit or an octopus could fold, as per usual.
On the other hand, the Eduard set also sometimes just replaces bad kit parts with bad PE parts, the two rear POL racks are examples of that. The PE parts are just thinner representations of the kit stuff. Neither will hold either of the 1, 2 or 4 gallon flimsies which they were supposed to, so it should be replaced entirely, but finding detailed enough pictures of the rack are hard to come by. And, if you do find them, you'll find that there isn't enough space behind the rear wheel to actually fit the proper flimsies, which tells me that either the wheelbase is off or the bed is too short.
At that point I declared discretion to be the better part of valour and simply cut the flimsies short enouh to go in the Eduard racks and moved on...
Things like the whinch sheave mechanism shoud be rebuilt entirely as it looks like it's made of welded 2" thick plate, but a you can decide for yourself where things need to be replaced due to being over thick. There's a lot of them.
Still, for all that, it's a good kit. Just more work than we have become used to.
Paul