I just put in a 261 to my 46 3/4 ton.
I went to Jim Carter's. He has a new intake maniford that bolts on and a nive holly carb that work very well. The problem is that the old exhaust manifold interfeered with the manifold, so on went a set fo fenton headers. The intake then gets warm water from the heater circuit.

it is working very well, but it did cost....


Ted Wilson