3932442 is a '69 - '85 cast crankshaft used in 305s and 350s. I would think that is the same crank used in pretty much every two piece rear seal truck 350. There were two different positions used for the timing tabs on the cam covers. Older engines like what came in the '67 - '72 trucks had the tab at about the 2:00 position, and the later model ones had the tab straight up at 12:00. You just need to have the balancer to go with the tab position that you are using. The crankshaft is the same either way.
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Tim
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