just bought a 1994 f350 duelly 5 speed, and iys a sweet truck, but noticed oil in water and mecanic said oil coolier was all smashed in there buy previous owner, and he is having trouble getting parts and i heard u should replace the whole unit 9 pieces, not sure what he is guna do,and i could relly use some help on this, and where to get some parts for the 1994 late so its the turbo powerstroke, please help, need my truck back....thanks