I assembled and detailed this model several years ago. I had a lot of fun detailing it with various components that you see every day but would not think of as automotive parts. Although the engine is glued together, I used a slew of 1-72 socket head cap screws to simulate the real thing. I spent a lot of time modifying the carburetors with venturis and linkage. These photos were taken before I installed the thermostat in the engine.
I made the valve cover decals out of scaled down copier transparencies applied with double back tape.
The sending units are really the valve bodies from BIC lighters!
I also have the HAWKE 1/4 scale versioin
Finally, I made the thermostats from the little clasps that you hold name tags on with.
I'm currently working on a clutch/pressure plate set up. The clutch plate is a cut down piece that fell out of an old CD player I was throwing out!