I don't know Ken of his work although it looks very well done, but his comment on pricing a rebuild on a 40 year old engine with out disassembly is spot on, you'll never know what is marginal with out examination and measuring all the pieces, one of the hard things to balance on a rebuild is where to spend the money you have to in order to get the results your after with out overspending it would be a shame to go through a rebuild and have a $10 dollar part bring the whole thing down, but on the other hand barring a power ball win you have to stop the spending somewhere, and this needs to be part of the conversation with any engine builder you use