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Pics: 305 or 350?

Discussion in 'The Garage' started by prossett, Sep 30, 2005.

  1. prossett

    prossett 1/2 ton status

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    Can anyone tell if this is a 305 or a 350?

    It's from a 1983 GMC Jimmy and the VIN tells me it's a 305, but who knows if it's been swapped out in the past 22 years...

    Any other way of knowing?

    [​IMG]

    [​IMG]
     
  2. RootBreaker

    RootBreaker 3/4 ton status Premium Member

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    well I do know in the back of the engine it will give the size... 5.7 or 5.0...etc... but it is behind the distributor.. hard to see when in the truck...
     
  3. prossett

    prossett 1/2 ton status

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  4. ryan22re

    ryan22re 1/2 ton status

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    i didnt think that they started doing that till 86 when the one piece seal was introduced. (putting the 5.0 or 5.7 on the block)

    whats the last three letters (or just two) stamped on the front of the pass side block (on the deck surface)?

    ryan
     
  5. readymix

    readymix 3/4 ton status

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    Form looking at the HB it appears to be a 305. I can only see a small cross section of it though.
     
  6. REDCRO_REDNECK

    REDCRO_REDNECK 1/2 ton status

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    I have 2 pre-one piece seal blocks that have the 5.0 LG cast in them one is a 1983 block
     
  7. ryan22re

    ryan22re 1/2 ton status

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    maybe it was 80 when they moved the dipstick then?

    ryan
     
  8. 3 on the tree

    3 on the tree 1/2 ton status

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    I know someone will correct me if I'm wrong. The 2 305s I have swapped out both had counterbalanced harmonic balancers, not smooth on the backside like a 350. I tried using the 305 balancer on a 350, and it was not pretty!!!
     

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