Don't think there is much you can do to a 450 pump except replace seals.
The aftermarket pump is probably a M&W or Hydreco. Don't know what they are rated for. Hydreco probably made the M&W unit. I have several of those pumps but have never installed them and don't know how they perform.
I doubt if you will find a stronger gear than the IH cam gear. I am not saying it is strong. Just doubting whether an aftermarket supplier offered an alternate. That gear was beefed up with the advent of the IH live hydraulic system as found on the SM.
If you have a need for more pressure than 1200 psi, you should go with slightly larger hydraulic cylinders for more lift or do something like what is pictured below. Northern Tool has them for around $520 or they can be found in truck salvage yards.
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Today's Featured Article - The Rescue of a Fordson F - by Anthony West. Introduction I live in the UK and have for many years restored Fordson tractors (in the main model N's). I have also restored and shown model F's, E 27N's, Field Marshall Series 2, David Brown Cropmasters and the old rey Fergeson T 20. At one time I had seven restored examples which were shown and used in ploughing matches. As most restorers, I have a number of war stories I can relate on a range of topics that may help other like minded and interested people. Perhaps my first p
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