i need to figure out if its possible to put my 95 monte's 3.4 dohc in a 97 monte that has a 3.4 dohc in it the 97's engine is leaking oil from the rear and i dont know where its coming from i do know that the tranny in my 97 is a 4t65e and my 95's is a 4t60 will i run into any problems is this possible and i believe that gm switched the 97 to the obdeII in 97 will that be a problem PLEASE HELP