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Trans and motor not listed on spid
My 71 gmc with a 307 and a 4 speed manual is not listed on the spid. Now i know the standerd trans is a 3 speed. With the 4 speed being an option. But the 4 speed looks like it is factory. So is it possible the spid is wrong? I don't think the 307 was a standered option. But I can't see any evadence saying it did not come with one besides the spid.
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 ( second times the charm) 71 gmc c15 307 sbc 373 rear gears positrac sm 465 trans. ( not listed on spid but is original )
94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless
07 gmc sierra classic rcsb 4.3 lt 5 speed w/t
04 chevy Silverado 1500 ext cab 5.3 4l60e.
81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green)
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