carburators

73 240z with holley 8007 carburetor (i know it's not the best choice for incline 6) , but i was just wondering if i will be needing a 4-9psi fuel pressure regulator, or a low pressure regulator which range from 1-4 psi? there's no mod except for the carburetor and electric fuel pump. here's...

I’m unfamiliar with these carbs and it seems like there are a few different year variations, and I want to know like if I need the early gaskets or the late gaskets, so any help would appreciated. Thanks!