T-120; I have installed a big block Desoto engine in my Plymouth P-15. I had to modify the front cross member to allow clearance for the harmonic damper, modify and flip the radiator bracket to effectively move the radiator forward 2 inches, modify my oil pan to the steering linkage did not hit it, notch the front fenders to get the radiator in, and a few other minor things I have forgotten. It is doable. I am using an electric pusher fan. Don Coatney