blueprinting oil pump

Never heard of blueprinting a gearotor pump. Simple inspection is about all most guys do, along with adding a 4130-steel pump driveshaft and a double pin in the dizzy drive gear. Blueprinting an oil pump is what GM guys must do to their gear pumps which need a lot of work. Normally with a Ford pump, I look for deep scratches in the soft cast iron of the main case, scratches of any size in the outer rotor and wear marks on the steel top where the gearotors rub during running. If it looks OK, it runs OK.

Inspecting or fiddling with the pressure relief valve requires drilling into the pressed plug and pulling it out with pliers, then cleaning out the drill shards before you can access the valve & spring. Then you get to locate another plug to reseal the thing against maybe 100 psi pressure. In an aluminum Ford pump that I rigged for adjustable pressure, I had to make my own aluminum setscrew to fit the odd diameter of the press-plug recess, after threading both the plug and pump.

Thanks Bosswrench I am not looking to do the spring mod just want to check clearances and adjust as necessary per Georges post. Are there any instructions or pics as to what this entails?

This bunch sell blue-printed oil pumps, maybe contact them and see if they can provide you their specs.
I have not used them.
http://stores.precisionoilpumps.com/ford-351c/