Double checked the motor...owner said it came from a larger truck (chevy)..the 261 is not orginal in the 46. I have a 235 from my 54 and I have the trans from it also since I'm doing some modifactions on the 54, I heard that all this would fit nicely in the 46, but I needed a carb on 46 to drive it down road..for the price he is asking I wanted to drive it first..