71 Dart get 408/ Trick Flow Heads....

I just placed the intake gaskets on my 96 dakota sport that has the trickfkow heads. I noticed the oil drain holes weren't very big. I am not doing it now. But was wondering if it wouldn't hurt to have the holes made bigger, the next time I have the heads off?
I’m thinking with hot oil drain back won’t be an issue, just with it cold. I tested (pre-prelubed) things to make sure I had oil reaching all and I had it over flowing quickly. Then it pooled at the rear for a while, had to take my finger and push it along to lower it. But like I said, my engine is more angled so it only exacerbates things