Your combine isn't isn't stout enough to lift a 1630 cornhead, no one's is currently. It will require a minimum or 160hp, at the feederhouse, to operate (amazing tourque will be required to turn over = shelled out drivelines). It will weigh a minimum of 11,000lbs, which even a third or even a fourth lift cylinder won't support because of the lack of size of your combine's feederhouse. Better that you weight until a combine is build to handle the magnitude of affects that a 1630 will bring.