I know this is a saddle pack configuration but it doesn't look like this one has been shortened much..
You could always turn the rear wishbones around to shorten to wheelbase a bit!
http://rc10b4.blogspot.com/2008/10/rc10-b42.html
http://rsb.se/arena/showthread.php?t=39428
http://www.oople.com/forums/showthre...t=41353&page=3
look down the page.
Good luck with the build.