It's been some time since I've built any of the Jordan kits: I think that the 1940s bus was my latest. It's a pretty nice kit, although the front wheels benefit from a little extra bracing. My favourite is the Model A, which is a real gem. I found that the 1940 sedan didn't fit together too well. Most of the kits go together quite well if you take your time and are sparing with the cement. I try to leave the bodies on mine separate from the chassis', so that I can add or remove figures as required. Some of the kits can be better assembled by deviating slightly from the order given in the instructions, although I'm unable to recall a specific example. The Mack trucks, both the dump and the stake versions, are a little bit fiddly to build, but you can easily modify them to have an enclosed cab. The same goes for the Packard stake truck. If you are building any of the wagons, it is useful to make the front axle assembly moveable so that you can pose the vehicle turning.
Here are some photos of a few that I have built.
Model T pickup
Model A (the second vehicle is from Sylvan)
REA delivery truck, with a couple of Model As in the background.
Another Model A
An Essex, another Model A, and in the background, a Model AA bus
Model A pickup
At the exreme right, another Essex (the others are from Sylvan)
I've been trying to find a picture of the Model AA stake truck, or the oil truck version, to no avail. Either of these is a good starting point for modifying with a scratchbuilt body in the style of your choice.
Wayne