Seller notes

This is a pair of OEM GM cylinder heads for a Big Block Chevy Engine. The casting number on each head is 3993820. These heads were used on a variety of 1971 396 and 454 applications. These heads would be a great foundation for your stock or performance build. These heads are a blank canvas and you are the artist. These heads are in good stock core condition as shown. They just came out of the estate of a long time machine shop owner and performance enthusiast. These were in his personal stash. T...

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