I just measured those bearings. Here's what I got between flanges.
216 - 1.222
235 - 1.035 (1958 engine)
Use half the difference on each side and then have your machinist check the fit of the 235 thrust bearing.
I checked and your 235 crank should set in the 216 block without the thrust bearing in place. I couldn't tell from your picture how much you'd need to remove, as it didn't look like the crank was all the way down.
