4onthefloor, There are manifolds that use the Ford/Holley 94s or other 3 bolt base carbs. Edmunds custom made them and Tom Langdon had two of them at Hershey last week. I have one on my 261 and they work fine. Unless you are going to run some high rpm's two of those carbs are about all you need for a street driven 261. I also have interest in fabing a manifold for three side draft corvette carbs. Maybe we can compare ideas.
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Gael
37 chevy sedan, 261,t5
57 pickup
58 burb