The reason for the way its done was he had a lot of the pieces and all the original parts were gone or he didn't get them when he got the motor. He had already purchased the small bell for a 10.5" clutch, pressure plate , flywheel, the starter that fit all that, transmission and the Hamilton spacer and the drive shaft was already made so it was do the best we could with what we had. Re-doing it all to an 11" disc just didn't seem practical money wise. We added the Mcleod 10.5" disc, tall throwout brg, new fork and the hydraulics and brackets. He had a 14 spline small disc but it looked very small even on a 10.5" flywheel with not a lot of contact area.