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when mating a 350 to an sm420.....

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by lifted95z71, Mar 11, 2002.

  1. lifted95z71

    lifted95z71 1/2 ton status

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    what all will i need? the engine is a 79 350 (truck obviously)
    the tranny is who knows what year sm420. now i know i need a bell with a 4 11/16" opening. and i know will need a flywheel and such but i dont know which flywheel and such.
    so what flywheel am i looking for and what tooth counts/years will work with that bellhousing. also the clutch and its assembly. what am i looking for here?
    also if you could tell me what else to look for that would be cool. i know ive asked this before but i got 40 different answers.
     
  2. solowookie

    solowookie 1/2 ton status

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    there are thats that allow the old inline sixes to be bolted up to a 700r4 etc. so if you can find one of those it should work in the reverse fashion. I gotta ask though why not just use and sm465?
     
  3. lifted95z71

    lifted95z71 1/2 ton status

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    i just wanna use a 420.
     
  4. lifted95z71

    lifted95z71 1/2 ton status

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  5. m j

    m j 1/2 ton status

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    the novak site claims it is common car bellhousing index and bolt pattern but you drill the threads out of the bell to allow the 420 bolts to fit
    the starter must match the flywheel you use unless you use the ancient cast iron truck bell with the starter that bolts to the bell rather then the block like anything newer then 30 years
    input shaft looks like every other 10 spline chev so any common truck clutch will work

    this is not info from personal experience just what I gather from the last dozen times this has come up, now go do it and tell me where i am wrong
     
  6. solowookie

    solowookie 1/2 ton status

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    I've gotta starter if you need it, but its mechanical...
     

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