Its not hard to take a Melling and blueprint it yourself. The you have a Butler "Pro" pump.
Whittmore used to take the 80lb SD pumps and cut either 1./2 a coil or 1 1/2 coils out of the pump spring. I gave him a 70lb pump. Played with shims too.
Why cant we have a manufacturer make us a inexpensive gearoter pump like Fords have ? Better design than a spur pump.
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