Cadillac X-sperts!

Can anyone tell me weather I can use '56 heads on a '51 Cadillac 331? Thanks, Dennis

 

I don't think you have a problem bolting on later Heads.
while we're researching Cad Heads, I'd like to find a site that would I.D. different years like the difference in 58 and 59 heads.

 

Sure, but you'll want the later exhaust manifolds too--the '56 ports are much larger than '51s.

 

Thanks for the help, I am new to Cadillac motors. Dennis