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I can't decide, 350 or 400?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bigblock454, Jul 24, 2002.

  1. bigblock454

    bigblock454 Clack Clack Clack Premium Member

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    I can\'t decide, 350 or 400?

    With a price difference of only $150 I can't decide. Arn't 400s slightly less reliable?
     
  2. kilroy

    kilroy Registered Member

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    Re: I can\'t decide, 350 or 400?

    That’s what I here. Been told they are more prone to overheating. If you can, go with a 350 block and a 400 crank (383?), I here this is a really good combo.
     
  3. K5Crazy

    K5Crazy Registered Member

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    Re: I can\'t decide, 350 or 400?

    Yes a 350 with a 400 crank would be a 383.
    I had one for a few years and that car flew.
    But I would get the 350- just my two cents.
    Ken
     
  4. laketex

    laketex 3/4 ton status

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    Re: I can\'t decide, 350 or 400?

    why dont you keep the 454?
     
  5. Derf00

    Derf00 1/2 ton status

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  6. BLUESMAN

    BLUESMAN 1/2 ton status

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    Re: I can\'t decide, 350 or 400?

    Maybe he's thinking of TH350/400 trans?If he does have a 454 motor I think the choice is easy....TH400!But maybe he's talkin' motors?
     
  7. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: I can\'t decide, 350 or 400?

    400 ALL THE WAY!
     
  8. K5Crazy

    K5Crazy Registered Member

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    Re: I can\'t decide, 350 or 400?

    I didn't think of that,
    but ya the TH400 would be the way to go.
     
  9. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: I can\'t decide, 350 or 400?

    Derf00,

    I dare you to post in that forum that that 383 hardly touches 500 HP and it's a long way from 580. What a line of BS. 580 HP small block with a 3.75" stroke? Tell that moron to dream on (and that if he wanted those kinds of horsepower numbers and that big of a cam, he should be building a 377 (4.125 bore x 3.480 stroke) anyway.
     
  10. BorregoK5

    BorregoK5 1/2 ton status

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    Re: I can\'t decide, 350 or 400?

    For $150 more I'd take the 400 and the advantage of bottom end torque a heavy 4x4 really needs, if it was for a lighter car... I might take the 350 and look for some rev's out of it to make up the difference.
     
  11. bigblock454

    bigblock454 Clack Clack Clack Premium Member

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    Re: I can\'t decide, 350 or 400?

    Thanks, I think I will go with the 350 *Engine*. This motor will see regular abuse and absolute durability is what I am looking for.
     
  12. bigmack

    bigmack 1/2 ton status

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    Re: I can\'t decide, 350 or 400?

    Anybody who tells you that a 400 is less reliable or less dependable than a 350 just flat don't know what they are talking about. My 400 gets ripped up to around 6000 rpms several times everytime I take the truck wheeling. As far as overheating, they do need a better cooling system than a 350,but if you put a 4 core radiator, and a good fan on your truck it will never be an issue. Over the years I have had several 350's and 400's, the 350 is a good motor but I would choose a 400 any day of the week.
     
  13. Rocky91

    Rocky91 Registered Member

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    Re: I can\'t decide, 350 or 400?

    Go with the 400, just as reliable as any other engine and more torque. The 400 overheating problem is an exaggeration, it is because the 400 block has some extra cooling passages that no other smallblock has. So when you swap out the original heads, any new (aftermarket) heads need a few extra steam holes drilled into them. With the extra holes you won't have a problem, without them it overheats.
     
  14. HarryH3

    HarryH3 1 ton status Author

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    Re: I can\'t decide, 350 or 400?

    As the old adage goes... There IS no replacement for displacement! /forums/images/icons/cool.gif I'd go for the 400!
     
  15. Parf

    Parf Registered Member

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    Re: I can\'t decide, 350 or 400?

    Go with the 6.2L diesel and never look back.
     
  16. JoseK5

    JoseK5 Registered Member

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    Re: I can\'t decide, 350 or 400?

    Do it once, do it good , go 383 with good components and professional assembly, and you will have excellent power with good fuel consumption.
     

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