Turbo oiling for 2.2 85 Daytona

Without getting into the bs I’ve been thru on this turbo 1 to turbo 2 conversion (sons car not mine) I went thru FWDPerformance for the converted turbo.
The company said to keep the warranty I had to buy their ss braided water and oil line kit. So I did. The factory metal line that was junk on disassembly was 1/4” steel tubing line used for our cars for like fuel vapor line or even brake line.
The SS braided line in the kit is like 1/16” inside diameter. I see on line a lot of turbos call for a .040” restriction.

1) why would you restrict the oil to the bearings
2) is there a difference between a restriction and a whole line at least 1/2 as small as what was factory?
3) should I have a local shop make a larger ss braided line for all the obvious reasons or run the 1/16” line. They are telling me it is a -3 an line but I don’t believe it.
I also don’t mess with turbos personally so my experience is diesel only and on trucks
With modified engines it is as big a line as you can fit as long as the drain is 1-1/2 times the oil side.

Currently our oil drain is #10 I think we are good.