I have a set of small block heads from another project-from 1976! They are double humps with 1.94 intakes and 1.57 exhausts, no mounting holes on either head. The casting # on both are 3782461. Other markings are C5, GM3 and C193. Because of the lack of mounting holes we didn't use them on the original project and I can't use them on the Chevelle. They look like low milage running take -offs, the guides feel good, the stems aren't mushroomed and they don't appear to have been shaved or even apart. My question is what did they come off of, and what are they worth? My guess would be something of moderate to high performance without power steering or air, and they would be worth something to someone looking for some performance gains and more to someone doing a correct restoration and absolutly, positively had to have the correct date coded castings. Can anyone ID these from the casting numbers or can direct me to a site that can? Thanks-Mike

Early 60s HP engines used them. In their day they were the best but are very outdated now. Restorers would want them depending on the dates.

Mike,
As mentioned, those were "THE" head to have back in their day. They were the best of the best of the best.
The 461 casting was the very first casting with the double, or "camel" humps. This particular head was FIRST used on the 1961 Corvette with a fuel injected 315hp/283 engine. Thus, us old timers have come to call and know them as "fuelie" heads. The younger guys call them fuelie heads only because that's what they have heard them called, not because they know the original history of the term "fuelie".
In their original 61-63 configuration, they ONLY came with 1.94/1.5 valves. Then, in 1964, the heads used on the highest performance engines (350hp, 365hp and 375hp) got the larger 2.02/1.6 valves and the lower perf engines retained the 1.94/1.5 valves. When the heads were machined for the larger 2.02/1.5 valves, the combustion chamber wall next to the intake valve was machined to help improve the air flow around the head of the intake valve. The LAST year for the 461 casting was 1966. The 461 was replaced in 67 with the 462 casting. The VERY last year for the double hump heads WITHOUT mounting holes on the ends of the heads was 1968. At one time, as already mentioned, this was the head to have. But today, its only significant value is to the restorers (mostly Corvette guys). The heads that are available today are FAR SUPERIOR to these out dated double humps, both in flow, valve size and combustion efficiency. For an early engine, that does not require holes in the ends for accessory mounting brackets, they make an acceptable head, but nothing special. Personally, I would be interested in a set of these heads (assuming they are in good shape and rebuildable), for a reasonable price. If you want to get rid of them, email me at home.