which carb is best?

Hi, I have a '74 ute with a stromberg carb that I'm about to buy an adjustable main jet for, but I'm wondering what the consensus is for the best carb for the P motor. The ute came with the stromberg but its far too rich. I haven't taken it off yet to see what size it is. What size works best on these motors? Is the stock one still better? Are parts still available for the stock one?
Thanks