Hey guys my name is Kev and I have a question about changing my motor.. If someone can help me I'd appreciate at. I have a 97 Silverado 4x4 that I need to put a motor in it has the 5.7l vortec. I've been told the only thing that will interchange with my truck is a motor from another silverado from 96-2000 and the eight Vin digit has to be a R. Does anyone know that for a fact or will anything fit as long as its out of a 4x4 and between 96-99 fit including one out of a 96 suburban? Thanks in advance.