There is a road test in the latest(april 2003) issue of RC car action magazine on a 1/5th scale truck with the Zenoah 23 cc engine. It is one manufactured by MCD. It weighs 28 1/4 pounds has 8 inch tall tires is 4wd and they say it will hit about 40 mph.. This is the distibutor they give for it.
http://www.brooklynhobbies.com
http://www.teammcd.com
Also on that V8 car the guy posted above. Man that thing sounds so darn good in the video. That small V8 makes a nitro car sound like a honda. Just incredible. Thanks for posting the website.