What is this caddy engine?

I saw Killer building this truck last year or so when I was at his place, and the caddy engine that was in it has been in the back of my mind since. I know nothing of caddy motors - other than that I really like the look of this thing - anyone?

 

not sure what year that one is, but they looked like that from 49-62, mostly

 

99% sure youre starin down a 331....

possibly 365 or 390, but something is tellin me 331

 

It has the later style valve covers on it (365-390). The early style had Cadillac in a script style lettering.

 

It looks sweet - I could be convinced to ditch the flathead I was gonna build and go with one of these, if I could dig one up. Hmmm... just what I need - another monkey wrench in the project!

 

i was goin off the crossover tube, i for some reason am remembering teh 331s bein like that and 365 and 390s a lil different..

maybe im losing my mind cause all i thi8nk about is my rocket lately, caddy stuff is slippin, hahahah..

 

The crossover tube and water pump look the one on my 60. If so it would be a 390

 

If those are stock valve covers (you could only guess), they started using them on the 1956 365 engine and on up to the 390s.


If you want a caddy motor you have to run the 365 or 390. The earlier ones are great if you have them, but if you have a choice go with the later. The rear seal on early ones leak really easy and are a pain, plus early ones had factory overheating problems until 1952.

Hyfire

 

...but the 331s (except for '55) get bonus points for being a LOT easier to find standard shift setups for.

 

Not a '57...
Dipstick on mine is on pass side. Water pump inlet different side too.

 

looks like OGNC's motor in his RPU build