I was sent this picture this morning about a new oil pump setup
The midplate appears to be stainless
The gears are aluminum
It comes with 2 gaskets
It has a stock spring with a adjustable screw
The gears are longer
The good: Will increase volume and pressure, wont leak
The bad: over time the aluminum gears become less efficient due to abrasion, if your oil pump cavity is too tight you will bind these gears and cause major distributor gear wear or failure resulting in a scored pump-damaged gears or worn distributor gear. The adjustable spring setup does not change the spring rate and consequentially doesnt change the pressure untill the spring is pushed so far it will not let the plunger kick back to the pressure relief and give you a bloated oil filter or have you oil filter bypass activate allowing dirty oil into your galleys. If the alumunim gears are simply pressed on the drive gear shaft they will expand with heat and the shaft will spin in the gear causing a damaging zero oil pressure and flow situation at running temperature or that slightly higher in the 190-210 range. The longer the gear the more the chatter of the pump. When these long gears were originally tried in the mid eighties a longer idler shaft was used to prevent gear chatter, this kit doesnt come with a longer idler shaft, but with a longer gear. Mid to large size engine builders like Precision engine out of houston texas know fully the issues of pump chatter. We have spent alot of time and money on the AMC oiling tech and found that the only real solution is to start with a good toleranced pump and use clean oil and a good filter. Their are other ways of extending your pumps life such as nickel coating, stainless inserts and higher pressure springs and very effective higher capacity oil pans.
These kind of pieces scare me when I think of oiling in my personal V8's. This kit is being sold as a race kit. I dont see how it could be a race kit as your motor by the end of the track has run hot and thermally expanded the billet aluminum faster than the cast and will cause major problems