dual quad small blocks?

The biggest thing really is the plenum volume, and how you increase it and still keep it under a hood. The older intakes relied on more than one carb, because a "big carb" back then was 625 cfm dry flowed. Which really equates to about 530 cfm wet. Now we have single 4s that are wet flowing 1000cfm+, and 900+ in street forms. It's easier to get plenum volume, and keep a single big carb wheere it needs to be for the best cylinder to cylinder distribution. Which in a V8 form and central carb is pretty much impossible to get "good". The STRs are still the best IMO, and you could get 1-4bbl, 2-4bbl, or 2-4bbl cross ram tops as I recall. I dont remeber if they had a 6bbl top for them. But I dont think they are making them right now. You'd do better trying to resurrect the STRs from edelbrock, than start from scratch. The Victor 340 is their answer to strokers right now.