Thanks, but if they are the same engine type, I don't see how putting the original engine back in GT, and giving the "wrong" one to the GTE would harm the GTE owner. He has the wrong motor anyway. In fact, I'd think the GTE owner would make out very well on that kind of deal, because it seems to me that the GT owner would be willing to pay money above a simple swap to get it. That's what I would try to do if I owned that GT, but I'm not interested in vintage Ferraris other than that I love looking at them and find the subject interesting. But you have satisfied my curiosity, so thanks again.