hi ,i have a elxi sportrak on a j 92 plate ,the cam has sheared and the cam holder furthest from the pump is badly scored,i have a 2litre petrol engine from a fourtrack,and am wondering would it be poss to use this engine in the sportrak,but what problems are likely to arrise and is it possible to do this,or where could i aquire a head with cam,anybody help please,thanks

vince