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Recently acquired her. Numbers matching, almost perfect condition. upgraded to a 440, .30 over. I also have the original 318 and 727. Dyno test sheets shown 465 hp@5000 rpm@ 487ft/torque. I plan to spend the winter going over her, attempting to 'correct' any deficiencies.
Then it's no longer #'s matching. Just keep the original drive train in the garage. Did you upgrade the torsion bars? The ones for the 318 are different from a 440. The 318 radiator is smaller also, I would recommend upgrading that to. I have done this conversion before. Nice ride!!!