And you might check the rods. Seems the factory musta had some leftover 496 (340) rods. I have found them in a few untouched (date coded bearings, factory head gaskets) 70 thru 72 318s. Also, the 71 318s often used a Rochester 2GV carb. This was a one year only part. Might be somebody hunting that. And the intake if it's a single plane. The dirt track guys who are not allowed to run 4 barrels like them. Make me a deal on the whole thing.