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Will a '90 350 TBI system from a pickup fit a '75 350???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by FWP, Jun 15, 2001.

  1. FWP

    FWP CRS

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    Will a \'90 350 TBI system from a pickup fit a \'75 350???

    I'm lookin to buy one used from a wrecked truck, just ran into it for sale a few days ago. Any thoughts would be helpful.. TIA

    <A target="_blank" HREF=http://fwp4x4.rockcrawler.com>http://fwp4x4.rockcrawler.com</A>
     
  2. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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    Re: Will a \'90 350 TBI system from a pickup fit a \'75 350???

    You would need to change the heads over also......Dan
     
  3. FWP

    FWP CRS

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    Re: Will a \'90 350 TBI system from a pickup fit a \'75 350???

    I thought that might be a problem, but wasn't sure. The funny thing is the engine may not be the original. Hmmm my doubts are getting bigger[​IMG] as to buying this thing....

    <A target="_blank" HREF=http://fwp4x4.rockcrawler.com>http://fwp4x4.rockcrawler.com</A>
     
  4. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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    Re: Will a \'90 350 TBI system from a pickup fit a \'75 350???

    I am thinking about doing it also. I have a 86. I still have to worry about smog.Dan
     
  5. FWP

    FWP CRS

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    Re: Will a \'90 350 TBI system from a pickup fit a \'75 350???

    Emissions are always tough to deal with when swapping stuff, bummer. I thought 350 motors up to mid 80 had identical heads, and they changed at some point. Not sure about the details?? I'm sure somebody knows the story here on the greatest site in the universe[​IMG]

    <A target="_blank" HREF=http://fwp4x4.rockcrawler.com>http://fwp4x4.rockcrawler.com</A>
     
  6. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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    Re: Will a \'90 350 TBI system from a pickup fit a \'75 350???

    I know they switched them in 87. I missed the cut off by 1 year.......Dan
     
  7. taterblazer

    taterblazer 1/2 ton status

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    Re: Will a \'90 350 TBI system from a pickup fit a \'75 350???

    what do the heads matter for tbi?
     
  8. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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    Re: Will a \'90 350 TBI system from a pickup fit a \'75 350???

    The intake manifolds are diffrent......Dan
     
  9. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: Will a \'90 350 TBI system from a pickup fit a \'75 350???

    All you have to do is modify the 4 holes in the intake and they'll bolt right on. This is very common for people who want to put an old style intake on the newer (centerbolt) motor. The four holes in the new motor go nearly straight down instead of at an angle. So, you drill them out at the correct angle and put the bolts in, and you'll be fine.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  10. K5 NUTT

    K5 NUTT 1/2 ton status

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    Re: Will a \'90 350 TBI system from a pickup fit a \'75 350???

    Unless i've lost my marbles i think I JUST swapped in late model TBI into my 79 K5...and if i remember correctly i talked to you on the phone this weekend and you never mentioned this....lol. When we come up in July i'll school you in the HOW TO portion of this class...and i'll let you take plenty of pictures...lol.

    Azblazer

    1979 K5 350 TBI
    1976 K5 Chalet
    If it ain't got arizona pinstriping.....you ain't wheelin the pee outa her!
     

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