These Webers surely need the fuel regulator too.
I was always running rich until i put it in, set to 3.5 lbs.
i have a74 1.5F and went from the 32/36 to the 38/38. HEI and headers with elect choke.
I wish PO has saved all that carb and air cleaner set up, but alas it is what it is S O C K S😉...