Thanks for the compliment. And I knew that some folks like it, since they've taken the liberty of lifting complete 'spec sheet' pages, practically intact....and with no credit given, of course. On a good day, this leaves me feeling flattered. :-\

[...] shows a spec for the 1968 W code engine with the annotation at the bottom of the page that the blocks were cast for 4-bolt but not machined. Please clarify this, as I have heard that the 1968 Cougar 427 hydraulic motor was a two bolt, and this is something that I'm very curious about and want to learn more.

I hate to bum your cool, P, but that passage has a very significant typo...a whopper, even. Its supposed to read as follows: "Some blocks are cast for crossbolts, but not machined." Makes all the difference in the world, doesn't it? And not just grammatically.

Of course, I'm betting the change began with late-production '68 blocks and then extended into service parts. Frankly though, the old literature I've seen is ambiguous. I had meant to return and add more info - like a cutoff date - but never got 'round to it. Please extend my apologies to the faithful...mea culpa, folks. ;-)

Mr F