I think that this is the third or 4th. time that build has been featured in a thread. Other than the block and the crankshaft, that thing resembles a 261 about as much as a sirloin steak resembles a can of Spam. I'm working on something similar, except it's going to have close to 300 cubic inches, and it actually uses stock 261 pistons. No, I don't use a turbo, and the HP is probably closer to 150-175 than 500, but the engine will actually be useful for something other than bragging.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!