There is one other thing my engine guy swears by,  that I still am not to sure about, but maybe this is the place/post to to clear it up.
I bought oil restrictors for my first build and when I gave them to Don (engine guy) he asked what they were for ( I know he knew but he wanted to drive his point home), when I told him he threw the bag in the trash  , I about shit, then asked what the hell he did that for, and his response was that if I wanted to slow the flow to the top end we would just put smaller holes in the cam bearings. It made sense, and I wasn't going to convince him otherwise so I let him run with it. It seemed to do the trick, but I still wonder ?
Any comments ?

There is one other thing my engine guy swears by,  that I still am not to sure about, but maybe this is the place/post to to clear it up.
I bought oil restrictors for my first build and when I gave them to Don (engine guy) he asked what they were for ( I know he knew but he wanted to drive his point home), when I told him he threw the bag in the trash  , I about shit, then asked what the hell he did that for, and his response was that if I wanted to slow the flow to the top end we would just put smaller holes in the cam bearings. It made sense, and I wasn't going to convince him otherwise so I let him run with it. It seemed to do the trick, but I still wonder ?
Any comments ?

That would be called a "free mod", flip it over and drill a smaller hole in the cam bearing instead of spending extra money on the restrictors.

You can restrict the oil later by installing a roll pin in each of your pushrods, instead of buying "restricted pushrods" .....hand full of roll pins < $5  restricted Pushrods  $200+