Can’t answer about the Annual boosters but on my car I ran two 650 DP Holleys, but I added two proform main body’s with down leg boosters. I used the base plates and the metering blocks from the 650DP carbs. They worked great on my 93 pump gas stock stroke 440. But if you don’t want to buy the proforms. I would try and find another 750DP with the down leg Boosters. I think they are soposed to flow Better