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Old 02-10-2022, 06:18 PM   #1
72 k15
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Join Date: Sep 2018
Location: Fargo
Posts: 379
Sm318 to Sm420 swap in 59GMC

I would assume its a pretty easy swap im getting sick of the first gear in the 318. I know the tranny hump will need to be replaced with the sm420 one but anything else? Driveshaft length the same? Mounts?
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1959 GMC 100 3 on the tree 270.
1968 GMC k2500 Stepside
1972 Chevy Monte Carlo Custom.
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