Does it even do anything or have any beneficial effect on the b7's?
I second this. Just smoothing it out and giving the oil a clear path to the oil passage in the pump will suffice. Shimming it isn't necessaryThe same as any other pump ported, getting rid of any sharp edges and smoothing the port is always good for a pump. I wouldn't shim it though.
I couldnt get those screws out as well. I used an impact driver *WARNING* You can crack the oil pump gear cover using an impact driver. then i bought a new one and was able to remove them without a driver.The motor is built and turbo. The pump is ported already (just the hole to the block because try as I might, I couldn't get those screws out) but it's old so I was thinking about getting a new one and trying again but didn't want to waste the time and effort if it didn't really do anything.