GM's 216 Part progression:

1950 Parts List
1941-48, All, 1110090 (216)
1949-50, 1112362 (216)

1957 Parts List
1940-49, All, and 1950-53 (216) use 1112362

1962 Parts List
1940-49, All, and 1950-53 (216) use 1112362

1970 Parts List
1940-62 Pass. (6 cyl.) use 1112403

GM would have an end-of-life stocking policy so the recently made parts become the replacements.
It doesn't mean the newer parts work as well as the original. In 1970, GM is listing a 235
distributor for a 216 engine. The 216 and 235 distributors have different vacuum advance curves.
This is where the owner needs to do the research into what they have.

A 1954 parts supplement says:
"A cast iron alloy camshaft will replace the forged camshaft in mid 1954 season, a cast iron distributor
drive gear also will be introduced at the same time."

The question comes up about using a 216 distributor with steel drive gear in a 1954 and later 235 engine
with a cast iron camshaft. Is it safe? The answer is that you can purchase cast iron drive gears to replace
the steel ones.
Attachments
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Curve 02.jpg (107.04 KB, 166 downloads)

Last edited by buoymaker; 12/04/2021 10:38 PM.

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."