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what parts would be needed when going from a 77 203/th350 to a 208 ?

Discussion in 'The Garage' started by R77K10, Apr 29, 2006.

  1. R77K10

    R77K10 Banned

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    Location:
    Lincoln IL
    if i were to want to swap the factory 77 th350/203 to a th350/208 what all parts would i need

    208 crossmember ? flat one or W- one ?

    adapter ?

    driveshafts ?

    what is everything that i would need to find/swap/change ?

    would i have to modify the shifter cut-out in the floor ?


    anyone know of a 208 truck being parted in central IL ?

    i have to swap the th350 for another or have it rebuilt anyways so i figured that would be the time

    i dont like 203 cases at all


    thanks
     
  2. 1979jimmy350

    1979jimmy350 1/2 ton status

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    you need a longer output shaft to run the 208, or you can get a short 2wd shaft and cut a little bit off and it will work also
     
  3. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    X2
    also with that, you need the rare th350/np208 adapter, OR the 700r4/np208 adapter with a 1.75" spacer.

    the adapter dictaces what crossmember you need. tall adapter, flat crossmember. short adapter, W or S shaped crossmember.
     

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