The 4 barrel dooesn't feed fuel as evenly. You will have to buy it and the manifold, which won't be cheaper than just making your SU's work and the 4 barrel will be harder to adjust the mixture versus the very simple SU's

I have both setups so therefore it will be cheaper it’s just tuning is the issue


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Sell the 4 barrel setup and use that money to finish the SU's. They are a better setup over all, unless you are very good at tuning 4 barrel carbs