Good luck on it! If you have any questions feel free to give my old man a call as we have finished up our alluminum ritter block engine. The last issue we had, and hopefully we can help you avoid with yours was oil drain back to the pan from the valley. The enclosed cam tunnel with small drain backs is not enough and after a short time on the engine dyno the pan was empty. We had to disassemble it, and put better drain back passages in it, and it is happy now. A lot of hours chewed up though.

Wayne @ Joss Engines. 1-403-320-7272

-Kenny. I think you should disclose all the issues with the block as soon as possible like now.. this would help those that are trying to build succeed.