Thread: 351 conversion
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Old March 28th, 2014, 07:13 AM
bigblockv6 bigblockv6 is offline
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Default Re: 351 conversion
The SM-420 was used from 1947-67, sounds like your 48 has this trans. Don't think your conversion is far fetched, GMC used to promote repowering older trucks and other brands with it's V6.
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