I dont know any thing worth while about the EB tractors. What I do know about the kerosene burning tractors is that they start on gas and must run on gas untill the heat retainer will keep the intake air warm. The engine needs to be put togather with eather two matched head gaskets or crator pistons. I have some 3 1/4" crator pistons here I took out of a kersoene burning B tractor that I can take a picture of if it is of interest. I am attaching a drawing with the heat retainer as part of the drawing.