To all: I am currently building a 272 cubic inch 261, and among other things I am using a 3x1 Offenhauser manifold. I have had machined three beautiful adapters to mount three of the progressive holley- weber two barrels to this manifold. This engine will be done and installed soon.
I am now looking forward to my next engine, a stronger (I hope) 292. However, for nostalgia, I wish to retain my 3 x 2 barrel set up. So, my question is; Are the carb pads on the Offenhauser manifolds for the 235/261 engines and those used on the 230/250/292 engines the same? I would like to be able to retain these adapters. Thanks