1) I’d like to know more about narrowing of the #3 web.
2) Does the 216 block also need some sort of align-bore procedure to accept the 235 crank?
3) Is the Buick wrist pin a press fit design or something else?
Fun fact: the Buick 215-based design was used into fairly modern times in Land Rovers. Might be an alternative source for pistons and such there. I’d have to go do some reading to understand what all they changed through the years to test that theory. Perhaps HRL already knows.
Edit:
* Here is a site that has many different iterations of the Rover pistons for sale. They don’t list compression height to verify that matches the Buick.
https://rimmerbros.com/Item--i-GRID800016* A good overview of the Buick/Olds V8 use in the Rover line and various revisions into the 90s. Might be some other bore size possibilities…
https://www.hemmings.com/stories/article/buick-215-cu-in-v-8-rover-3-5l
