Going to paraphrase something I’ve seen from Pre-68 Dave here a number of times: A 235 will run pretty well with 216-sized manifolds and carb. Perhaps a bit more throttle response (makes sense), giving up a little bit at higher RPM.

I also know at least a few here that have direct experience with the same. “DADS50” ran a 235 with a 216-sized YF. Struggling to come up with another name, but he’s not the only one. I think there might be also be a member or two using the Zenith that is sized for the GMC 228.

Random, semi-related musings:

* I now believe the “hype” about the YF. The improvement in my engine’s smoothness and performance was very real when I made the switch.

* I have a theory I’d like to test someday, if I ever win the lotto and get to piddle with trucks full time. Stovebolts of all shapes and sizes suffer from poor fuel distribution/ efficiency due to pretty awful intake and combustion chamber design. It is aptly described as a tractor engine, and there ain’t much we can do about that.

However, I wonder if some improvement in performance or efficiency could be made by INTENTIONALLY using the 216 manifolds on a 235, along with a carb that is properly sized for the displacement. (I.E. the Olds application WA-1 I mentioned previously) Perhaps improve atomization with the smaller ports and increased velocity. Still have the right about if fuel and air at a given RPM.

It’s entirely possible that approach would produce a negative result. But I’d still love to try it just to find out.

1951 3100