Read what you wrote up above, again, Jerry.
The statement below is all that I questioned.
"NO 235/261 engines had Babbited rods"
No 235 engines had Babbitted rods?
All 1953 and earlier 235s (1937-1953) had babbitted rods.
These 235 engines had babbitted rods?
(I am not sure about the 1953-55 Corvette 235s)
Your original statement has nothing to do with the material used on 235/261 insert bearings.