Didnt hear it run, he assured me its fine, he had just pulled it out of his 69 charger(opted for a 440) He will also give me the cam and lifters from a 440 that was in the 383, said he labeled where everything cam out of, plus a bunch of small parts...starter, headers etc. going back tomorrow, going to check pad behind distributor for numbers (didnt know where it was located on a 383) and try to swing a good deal.