So I finally ran the numbers off my 427's, both are tall decks. www.MorTec.com lists a tall deck and a short deck 427. Is the tall deck as good a builder as a short and what is the difference exactly? Also the head numbers came back as oval port with open chambers, are these alright or should I be on the lookout for some other heads. I'm not looking to build a crazy race motor out of this (yet!) just something to make good power and rev. a little. I'm just trying to get my ducks in a row so buy this time next year I can drop one in my K5. Thanks for any help to a motor building newby.