I went with the owner of 6S1232, Steve and his son, up into the Sierras today and got the block. It IS the original. I can't show you the Ford VIN numbers as that is part of the Shelby owners confidential information. (I know what it is, but you won't.) The story behind the engine goes like this: sometime in the early 70's, 6S1232 had an engine change. The original block was damaged, to what extent remains to be determined. The right and left rear lower threaded mounts, the "ears", to the transmission show signs of welding. How, when, where and why are a mystery. A guess on my part would be that the car got airborne and the impact broke the engine to transmission connections. Then, a new block was installed in 6S1232 to be driven around for the last 40 years. About two or three weeks ago, Steve got an e-mail from the Shelby registry about the block turning up. He had to prove that he did in fact own and have in his possession, 1966 Shelby GT350 6S1232. Then he was told who had the block. The guy that had the block is into Mustangs and seeing the VIN, made inquiries and found it was a Shelby block. There are good guys in the world. In any case, the block should be in Steve's garage about now, and I had a good day driving up the "hill" and back.