We made a Tech Tip out of rebuilding mine -- John's 261
BTW -- Using the 216 valve cover was a mistake. It looks cool, but it has made quite a mess of the engine. I am in the process of returning to the 261 valve cover.
That’s a nice write up on your 261 build.
~ Dave 1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission