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366 chevy engine

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bad_bo_ti, Mar 7, 2001.

  1. bad_bo_ti

    bad_bo_ti 1/2 ton status

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    any one have any infor on the 366 engine, i called around trying to find a big block at semi yards adn they carry 427s and 366s, they only had 366s right now. any info would be greatly apreaciated. thanks.
     
  2. muddin4fun

    muddin4fun 3/4 ton status

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    I would make sure parts are easy to get before you concider it

    [​IMG] Keep your feet dry [​IMG]
    <A target="_blank" HREF=http://muddin4fun.coloradok5.com>http://muddin4fun.coloradok5.com</A>
     
  3. Triaged

    Triaged 1/2 ton status

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    Do you mean a 396 BB? I have never herd of a 366 BB (not that they don't exist). A 454 BB and a 427 BB are both the same except the 454 has a larger stroke (4" vs 3.75"). The 396 BB has a smaller bore than the 427 or 454 (4.093" vs 4.25"). Parts for a 427 or 454 are easier to find than for 396. All parts except crank rods and pistons are the same for these engines. I think that these motors were the same from 65-90.

    '71 Blazer CST with alot of rust
     
  4. bad_bo_ti

    bad_bo_ti 1/2 ton status

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    the guy said it was a 366, i know i was as suprised as you are, they were only used in the chevy semis or what ever they were, they were used in the heavy duty trucks, he said side by side the 366 and the 427 look identical, and parts wise he said big block is a big block, this i can see since 305 350 and 400 parts (some i know) are interchangeable, but to me i was thinking if they were identicle then the 366 would have a hell of a small bore and stroke right? so i should be able to bore it and stroke it out to a 427 maybe, just an idea, he said he has a couple and he can sell me one that is guaranted for around 850, and a rebuild would be cheaper.
     
  5. Andreas

    Andreas 1/2 ton status

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    The 366 is (was) a talldeck bigblock. Same stroke as a 427 (3.76") but smaller bore. 4 bolt mains and steel crank. Parts wont interchange with passangercar/ light truck bigblocks. With those few cubes and the weight of a BB you´d be better off with a smallblock. Or wait for those much sought after 427´s

    /Andreas

    406cui of pure sh*t[​IMG]
    <A target="_blank" HREF=http://hem.passagen.se/znus/>http://hem.passagen.se/znus/</A><P ID="edit"><FONT SIZE=-1>Edited by Andreas on 03/07/01 02:21 PM (server time).</FONT></P>
     
  6. pcorssmit

    pcorssmit 1/2 ton status

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    The 366s and 427 tall deck truck motors are used in the medium duty truck, ie Top Kick, Kodiak, C50, etc. They are built for dependability over all out power. They are basically build to handle running all day at WOT. My old work used to have an '87 C7000 w/a carbed 366 and a TBI 427. The 427 was pretty strong, and was governed at 4000 rpm. When you hit the interstate, you'd mash the pedal and stay at 4000 rpm and 72 mph. The 366 was OK, but didn't have the low end of the 427. Both these trucks were around 24-26,000 GVW and had 24' boxes.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  7. Gopherkiller

    Gopherkiller 1/2 ton status

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    Hi Guys, Had a lot of experiance with the big block 366 ci chevys. They were used in alot of the school buses and some of the dump trucks, ect. If I had to go with a chevy gas engine, (diesel man here,) it would be the 366 cui. You will get the torque of the big block, BUT, get good gas milage! GOPHERKILLER
     
  8. realsquash

    realsquash 1/2 ton status

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    They are high deck IIRC, both the 427 truck and the 366 (truck only). I've got a real nice 402 i'd sell you if you want a big-block :)

    Squash
    <A target="_blank" HREF=http://www.trailrunners4x4.org/users/realsquash>http://www.trailrunners4x4.org/users/realsquash</A>
     

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