Sorry! this should have been added to the previous post regarding propane 2.6! If moderator would move this that would be good... Went and looked at the Clark forklift. It is a 2.6 G54 like in our trucks but the intake sweeps down slightly and the exhaust looks more like a header that is turned so the exit is at the front of the engine. These pieces are not necessary for the conversion however. Looks as if this may not work for automatic trucks due to lack of linkage for kickdown cable but do not know positivly.