[John Brown]

If they are 57 heads, the casting number is necessary to tell if they have any real value. The 283 horse FI engine used the same casting number, 3731539, as garden variety four barrel passenger cars. Not much value there. The heads for 57 220, 245, 250 and 270 horse Corvette engines used 3740997. The 997's are the ones that are in demand. Without the actual casting number, you are just whistling in the dark. A fuel injection distributor will run into the several thousand dollar area most of the time. Even on the distributor we would need the numbers to give you an accurate estimate.