[piper6909]

Never done it in a Porsche, but I've done it in other cars. Best thing to do is have both motors side-by-side and transfer anything that's different from your seized motor to the new motor. Don't pull anything off your motor until you have the other one. Look very carefully, because it's always the smallest thing you may miss that'll cost tons of time. As an example, one time, I think it was a Toyota motor off an automatic going into a manual. Once we had the motor in, the clutch wouldn't disengage or something like that (it was many years ago). We took the motor back out and found that there was some small ring pressed into the center of the crank that we needed to pull out. It looks like 78F350 covered it well, so that may not be your case, but nonetheless it's best to have the motors side-by-side and compare everything from every angle.