Question about 472 engine
I recently bought a 1966 Coupe De Ville. Everything I've found has showed that I have a 472, not the 429 (valve covers, front assembly differences, ect.). My question is, what is the little tube looking thing between the heads? Goes from one head to the other, has a little filter looking thing on it. This is my first Cadillac engine and its got me stumped. Thanks in advance!