Are you building up an engine from a bare block, or putting a seal in one that's already assembled? If you've got a bare block, it's a one day road trip to my place, where I can machine your block for the full circle seal. The crakkshaft has to be removed and the machining procedure generates a lot of cast iron chips, so it requires a full teardown and a detail cleaning job afterwards.
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!