Thanks for the help so far. I am just using the rush for bashing around on dirt and pavement no big jumps I have a set of street tires. I also have a eb4 s2 buggy I use for the track. I would get next to nothing for truck right now so I may as well fix it. I like the os 12,15 idea will the hpi engine mounts and clutch work. Are there any other motors that will work. Thanks for anymore help.