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305 vs 350

Discussion in 'The Garage' started by PsychoticDeadGuy, Dec 8, 2005.

  1. PsychoticDeadGuy

    PsychoticDeadGuy 1/2 ton status

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    How can you tell the difference of a 305 and a 350? I am looking for 305 heads. Can someone help me?
     
  2. mr_clean

    mr_clean 1/2 ton status

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    if you're looking at the block the heads came off, 4" bore = 350.
    305 is a smaller bore but I'm not sure of it off hand. (better make sure the heads came stock on the block though) Otherwise get the casting numbers off the heads and there are numerous resources online to look up head casting numbers that will tell you if they are 305 or 350 heads.

    Or post up the numbers and someone can look them up.
     
  3. xpndbl3

    xpndbl3 1/2 ton status

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    i have a pair of 305 heads that look pretty fresh and are really clean. they were taken off a motor and i was going to port and polish them but i don't have the time to do it so i'm trying to sell them as is. they are 416 heads which are the best flowing factory 305 head out there.
     
  4. PsychoticDeadGuy

    PsychoticDeadGuy 1/2 ton status

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  5. 79k20350

    79k20350 3/4 ton status

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    why a 305 specific head? why not a 350 head?
     
  6. PsychoticDeadGuy

    PsychoticDeadGuy 1/2 ton status

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    a 305 head will fit on a 350 and bump up the compression.
     
  7. beastofablaze

    beastofablaze 1/2 ton status

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    somebody asked this a while ago...the answer was its a bad idea beacause the valves, runners, and cc are too small. They may bump compression but I seriously doubt you'll see any performance gains.

    why not get some 58cc vortechs? (I think they make 58's)
     

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