on the 01-03 style head the 750 and 1000 are the same head. The 750 head allready has the stiffer valve springs. The 750 head will go right on the 1000 engine. The upper 2 mounts on the 750 are both on the head. On the 1000 one of the upper mounts is on the head and one is on the block. So their will be a extra mount when using the 750 head on the 1000 motor. It will still bolt right up and work fine.