318 to 340??
MOUNT...
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Bracket bolts to the motor, this picture is the mount that goes between the K-frame and motor bracket. '72 and older.
Brackets with mounts...
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don't forget to chain it down! That 340 might have a bit more than that 318. That rubber Mount has a tendency to rip apart. I love the chain I wouldn't put one of those fancy store-bought hold Downs if it was given to me. I can't tell you how many people point in compliment and point out to their buddy "look it's a chain!"
I love doing old school crap like that and it just makes people think about back in the day...