The TTI headers chart lists that small block, big block and hemus all have the same crankshaft centerline. I'm trying to find the centerline of the transmission so that I can determine whether the engine leaning back is due to the engine being too high, if the transmission is too low or perhaps both. The measurements I took for the crankshaft were pretty close, just slightly high. I'm not sure if the engine needs to sit lower or the transmission needs to be higher to correct this and other clearance issues.