[68RT]

Silver if my memory has not failed.

 

[ImperialCrown]

I seem to remember silver and black. The larger Hemi's were gold.

 

[chuzz]

My Dad's 55 New Yorker had the 331 and it was sliver and black.

 

[68RT]

Black would be for the accessories like P/S pump, Generator, distributor, Fan/pulleys (crank balancer would be silver), Spark plug wire covers, starter, Breather cap/pipe, Filters, crankcase breather, and air cleaner. See picture of 1951 engine lower on the link (Top picture is the 392 with was different).

http://www.allpar.com/mopar/hemi/chrysler-hemi.html

ED: sp

 

[saltydog]

That was my gut feeling as well.