As far as I know they are Bill, I'd be suprised if they weren't. Most people are buying the wedge block. I have one that I will be turning in to a coffee table, it was one of the prototype blocks that has some machining faults. I have another collecting dust in storage. I think you asked about the deck height on these in one of teh Facebook groups, I wouldn't deck them past the 9.2" mark. The one I have, if you decked it to 9.0", it would be in the water jackets.