Still learning: Chev aircleaners

[BCA]

I’ve had these aircleaners for a long time but couldn’t break the part numbers: GMC 1529192, AC 111437. Finally a Neutral Number cross-over book gave several equivalent numbers including GMC 1542332, 1526795 etc. So this aircleaner is appropriate for most CMP’s which have the non-dust proof W1-518S carb with a carb flange 2-1/4” diameter. Later 15CWT’s, and maybe others, used the dust-proof W1-598S carb which attached the aircleaner with a square 4-bolt flange. My story and I’m sticking to it until someone comments otherwise. .... Brian