Don't know if you have seen this site Wade:http://www.o5m6.de/gmc_cckw353.html, has a nice side view which may help. If you can find a component with dimensions you know you can figure out the image scale for the rest of the dimensions
I started a simple scratch build of a 353 so know it can be hard to find pics. I didn't get any further than the chassis and other builds took priority lol

Watching with interest, good luck!
Cheers, Dave<br type="_moz" />