I was just thinking about te LT5 motor used in corvette ZR1's. Clearly an awesome engine, but here's my question. Did the LT5 have it's own unique engine block? I know it was based off of the LT1 sbc, but the LT5 was an overhead cam engine? If it used a normal LT1 block, what did they do about the hole through the middle where the cam would have gone in an LT1?