ok thanks for the advice guys im proly goin to levee my 3.3 stock and run the big joes on the 2.5 just got the losi xxx-nt running today project losi is under way the truck is proly 10+ yeas old and i got in goin in under a day it was blowing some nasty stuff out the pipe but it just needed to run in i lubed it all up with after run oil the carb was stuck shut lol it was a fun project now just need to fine tune