Hi Rastas, Both the body and chassis are vintage Strombecker..........unfortunately, the chassis you have is their earliest "metal" (aluminum) 2 piece chassis, powered by their Strombecker "train" motor. Not the quickest/best handling Strombecker chassis (that is more than kind), and while it can be improved, most folks are not interested in the costs/work involved.
They did make several chassis variations....plastic/aluminum,...all plastic, ...and brass, and all of these are much better performing than the one you have,....sorry to say.
Their brass chassis has proper bronze axle bushings, threaded axles/wheels, a "Hemi" can 16D sized motor. and well sorted, it runs extremely well.
The good news is that all of their chassis fit (they are adjustable in length) the Chaparral (and all Strombecker sports car bodies from that series of cars)....and, they regularly show up on the auction site, and are not overly expensive.
Looks like you are missing the windscreen on the Chaparral as well, and these are also fairly easy to find.
Cheers
Chris Walker
I pulled a few pics. off of google images......I don't have access to my own pictures at the moment.
The first pic. is their plastic chassis with "can" motor........a step up from what you have,....while the rear axle assembly "clicks" in, it is certainly more precise that the version you have.

The second pic. is of their plastic/aluminum chassis, with the Stromecker "hemi" motor (a very good motor). This chassis has nylon rear axle bushings, aluminum wheels (press on), and is a better performer than the all plastic version.

And lastly is their "Pro" brass chassis.......hemi motor, bronze axle bushings, threaded axles with aluminum wheels........Strombeckers best by far, and tuned well, it makes for a very nice (quick) running car.
