I run Amsoil Dominator 10w-30 on my stock block ever since I went with the new BB Fp Red. There's a certain power point where I want lots of zinc

. 3k oil changes. On a built block I would run the same thing, or a heavier oil perhaps like the dominator 15w50. Just keep in mind with racing oils like the Bradd Penn, or the Amsoil Dominator, you have very low amounts of detergents in comparison and as a result you need to change the oil more often.
I ran Amsoil Signature Series 0w-30 for a while (before the turbo) but when I discovered the amount of zinc content was only ~800ppm or so vs dominator which is around 1500ppm I swapped. If I had stock turbo and DD the X and didn't race it I'd still be on the 0w30 signature series probably, but I am constantly racing the car so I moved to a better oil.