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mother trucker's is right your 307 gears have a 3 series carier and the 373 that i have use a 4 series carier. the difference is were the ring gear is located to the pinion the lower the gear the closer to the pinion you need to be how close are you to PA ???? I,m pritty close to OH let me know maybe I could help.
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67 chevy short step 2wd 427
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69 chevy longhorn 5.9l cummins
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67 chevy lwb 4x4 454-in pieces
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67 gmc dump 4x4 1 ton-305 WTF!!
72 chevy 3/4 ton 4x4 burb 350
70 chevy panel 2wd 302 5 speed tko
"THERE IS NO REPLACMENT FOR DISPLACMENT"!!!!!!!
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