Oh I forgot to tell you for my opion if I had the 2 motors setting in my shop and to make the choice of which one I would build it be no question to me.The 327 if it is a large journal if I was to get serious with it.The 327 in my opion will hold the RPM's better less likely to have as much problems out of the heads do to the steam hole in 400's which has a history of causing grief and in my opion I believe the 327 can be built to run just as strong as the 400. And thats just my opion for what its worth. best of luke again.