Question about CAV pumps

[Ultradog MN]

I have an extra CAV pump off of a 175 here.
What is the difference between one for a 175 and a 201?
Obviously one for a 201 puts more fuel to the engine but where is that done? Are the injectors different or is the pump set to put out more fuel?
What would a guy have to do to use this 175 pump on a 201?
Ken and I have a future project in mind so just wondering.
Thanks

 

[thepumpguysc]

IF you have both pumps.. send me the #'s off the name plates and I'll look them up.
The max fuel is done on the inside and measured on a test stand. I DO NOT recommend trying it yourself.. HECK, I wont even do it and I've been rebuilding them for 30 years.