You may already know this, but just in case you don't: you can use the oil pan from a 3.0 or a 3.5 om603 on that motor. The pans themselves are different- the 3.5 does not have the side access that the 3.0 does, but they will both bolt up to the motor just fine. I am currently running a 3.5 pan on my 3.0 shortblock.