they offer a 4.84" an 4.9" and 5.0" option as well, the prob. is no one other than indy currently offer a head.. I'm glad to here that the people that have been waiting for blocks might actually see them , for me I orderd waited,waited and waited some more for a block that was everything put perfect,Including having the main seal area welded on...If it wasn't for making a trip down there a couple times, I'm sure I would be in the same boat as others!!! as long as ken black is involved in any future of keith black racing, they will never see a dime of my money again!!!