I have a 73 350 with 46 heads, dual exhaust (logs), and 4bbl e-carb. I used the edelbrock marketed version of the 2800. The cam swap netted me 10HP at the wheels with no change in peak torque, but moved the torque and HP peak up about 400 rpm. Lost a bit of torque below 3200 rpm.
Hope this helps.
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