It doesn't have it either. I just checked the one I have, no trim. However, I can see where one could be mislead to think it does have it, the picture on the box top, which is of the actual car, does have it.
Bear in mind, there are major differences between the '62 and '63 mechanically. The fames and suspension systems are different from each other, with the '62 using a torsion bar IFS and the '63 having a more traditional parallel leaf I beam setup. https://www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/Chevrolet-Trucks/1962-Chevrolet-Truck.pdf https://www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/Chevrolet-Trucks/1963-Chevrolet-Truck.pdf
Yes, Chevrolet did use quarter elliptical springs, front and rear, on the 490. Most of the other early Chevrolet cars (which includes the Little and Mason) used semi elliptical on the front, and 3/4 elliptical on the rear.
I use pretty much everything. Lacquers (both hobby and 1:1 car paint), hobby enamels (Testors and Humbrol), water based acrylics (mostly Tamiya, also Citadel), spray enamels, modified urethane enamels, fingernail polish, it just really depends on what color is available in what kind of paint and what I'm willing to deal with to use it. That said, for bodies I mostly use lacquers these days. Good color selection, fast dry time, easy to work with, and if you need to topcoat it, you can put just about anything over the top it. I work with both spray cans and airbrush.
If it's the one I think it is, it was a '67 Chevelle, all done with the then new Revell kit, or at least parts of it. I seem to recall that the tree wreck wasn't the end of the story, though. IIRC, there was a dirt track car phase, one where it was converted into a farm get-around vehicle (complete with a toilet in place of the driver's seat), finally junked, and one last one showing a garage sale with a few parts of the car in it. I think is was called something like "Larry's Chevelle".
Yes, I have to admit, I did purchase all the colors shown. However, many of them are seasonal colors that I picked up on clearance. None are mixes, but some of them are the same color shot over different bases, mostly in the yellows.
Looking good. A couple of things you might consider; Adding manual hubs to the front wheels. That would be correct to the part time 4x4 system used with the manual transmissions. Also, if you're going for an original condition truck looks, the bedwood would be painted flat black. That would be the same on all models, regardless of trim level.
Mike has the right idea. Photo paper works much better than decal paper for doing plates. If you have a decent image resizing program, you don't even have to worry about the image size. I tend to prefer using images that were shot closer up, mostly source from online sources, and resize them myself to .5 x .25 (depending on 1:1 plate size). If you get the right font for the letter/numbers, you can make your own "blank" plates very easily in a program like Paint, and put whatever you want on them. The plate on this Dodge was done on photo paper, using a blank plate made in Paint.
It still has the stock I beam axle, the only upgrades, other that refurbishing back to stock specs, are gas shocks, front and rear anti-sway bars, radial tires, and a steering stabilizer. It's still manual steering and manual brakes. It gets driven rain, shine, or snow (unless the snow is really bad, then I break out my 4x4). I will admit to a few safety/performance improvement concessions, seat belts, halogen headlamps, LED turn signal/brake lights, and for the dumb people who like to ride too close where they cant see the brake lights, a period correct 3rd brake light. I