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4 bolt main?

Discussion in 'The Garage' started by 64suburban, Jun 20, 2006.

  1. 64suburban

    64suburban Registered Member

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    I was wondering, did the blazer's from the 70's equiped with 350's come with 4 or 2 bolt mains, I'm shure alot of people here have pulled a few oil pans off and found out, I have a 75 k5 and it's 350 is resting on the back pourch, cann't easily check. does anyone know right quick if it is a 2 or 4?

    thanks alot
     
  2. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    Both my '78s had 4 blt mains. My '91 and '90 motors have 2 blt mains!
     
  3. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    since its out, post the number on the block and somebody here will be able to tell you
     
  4. JEBSR

    JEBSR 1/2 ton status

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    Both. some were two bolt some were 4. just post the numbers on the block like jimmy said and it can be decoded.
     

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