Nope. There were some prototype aluminum heads in '60three of them are known still to exist, and a few more probably doand there was another engineering project to make an aluminum head in the mid '70s when casting technology wasn't as problematic as it had been in '60 (one of these prototypes is known to exist; more might), but none of these were ever produced on a production basis or installed on a production engine.
Your guy might've been thinking of the fact that a special head was used on the '61-'62 aluminum 225s. The first batch of these had "SPECIAL" cast in the external casting number location (top surface between the front and rear threaded bosses, between the valve cover rail and the manifold mounting face); the second batch had a 5-pointed star cast in the external casting number location. All of them had the casting number 2206035 inboard of the valve cover rail (under the valve cover). This same casting number was in the external location on iron-engine heads. All these heads were made out of iron. The differences were slight: the head for the aluminum engine had closer control over the combustion chamber placement and max diameter to assure a full-circle seal against the narrow sealing surface at the top of each freestanding cylinder in the aluminum block, and there was additional clearance for the pushrods due to the slightly different pushrod angle in the aluminum engine.
For '63 (officially; practically late in '62 model year), the mods made to the head for use with the aluminum block were extended to all slant-6 cylinder heads, still with the casting number 2206035 which would remain in use through '66. Shortly into the '63 model year, the aluminum block was discontinued.
