Mike, I have an 11 inch that came from a total loss wrecked 1954 Corvette. I was pretty surprised...people all wanted to buy what was left of the engine but the flywheel was just sitting there. I used it when I converted to the T5 and it has been the best flywheel I've ever had. The extra 1 inch makes a notable difference. A friend of mine adapted one of the SBC flywheels. I didn't see it after he finished but he said he ran into some problem he didn't expect. I'd ask him what it was but he is no longer with us. Good luck in your search.
