Thanks a lot for the info, DF... I really like reading about what other folks do to enhance their builds, and I figured with a screen-name such as yours, you wouldn't mind expounding on the build a bit more..
Personally, I don't much detail and super-detailing work with a lot of refs... It depends on how much of vehicle's interior is going to be visible, the amount of work I feel like doing, and how much I'm willing to spend.. Of course, the latter is usually "Zero", lol...
I don't buy much in the way of pre-fab detail parts, preferring to make my own from resn or sheet/strip and structural shapes, but I do buy a fair amount of HO scale railroad brake parts to add onto various chunks of this & that to make a fairly convincing part for an interior. Whenever I get a kit that has a transmission and final drive parts, for instance, I cast several copies in resin for future use on kits that don't include interiors... Same thing for radios and such, and engine blocks come from 1/24th scale cars usually.. Rather than a nut-for-nut/bolt-for-bolt rendition, I go for the suggestion that something's in there... "Creative Gizomolgy" and "Imagineering" are my preferred methods of super-detailing, although that's not a license to invent entire sub-assemblies from my imagination, it DOES allow for approximate shapes and sizes to be constructed with a lot less headache... Suggestion vs. duplication, as it were, with plenty of wire and cables to run along the walls and over & through the "stuff...
Keep up the good work, and thanks again for the information.