Best forum on crawling by far http://www.rccrawler.com/ heaps of info for you to research .
Pitty i just sold this custom tube crawler last night , you would of just had to put it together and put your elecs in there , i had the Axial axles , links , shocks , tires etc.
This is the 1:1 Proffits cruiser that my crawler will be based on .
Any questions just ask , i use to compete in RC Crawling down here in Australia but most questions will be answered if you go to the forum i linked .