You will need to keep your eyes on the forum classifieds or eBay. Like the Jato big block kit, many of them aren't made anymore, so finding good ones is tough. I'm not sure if this is still made or not, by Dynamite makes a conversion kit for the T-Maxx. Just need a big block engine mount.
http://www.dynamiterc.com/Products/D...ProdID=DYN7402