On another resent thread I left off by needing to double check that my carburetor was the actual size for a 261 and not a 235. Pre68 Dave gave me sizes to check against and heres what I came up with: at the throttle plate I'm getting 1.600" or about 1 5/8" dia while another 235 carb I have measures out right at 1 1/2". So the question here is does that extra 60 thousands make my carb the correct 261 rochester model? 60k doesn't seem like much.
Secondly on an otherwise bone stock 261 will a 2 barrel progessive carb like a Rochester or Weber give me a little more oomph at the top end at my 7,000 ft. plus elevation or would it just be over carbureting the motor