I have seen zetor crystals tractors pulling in the summer at our local vintage show with the standard engine they do really well. but i have a question to ask which is non zetor. you ask people what is your favourite tractor pulling machine most say fordson major. now i am in the process of doing a 6 cyl major being fitted with a cargo 0813 engine. i am putting a clutch a pressure plate from a jcb 3 with the frodson skid unit. so the clutch should withstand the abuse is there anything internally that should be changed??? the engine is running @ 3500 rpm 380hp no turbo but a turbo from a volvo fl7 is going to be fitted what do you think???