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350 heads on a 305 will it work?

Discussion in 'The Garage' started by K5Dan, Oct 15, 2003.

  1. K5Dan

    K5Dan 1/2 ton status

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    will heads off a 350 work on a 305 ? help please !!!!!!
     
  2. sled_dog

    sled_dog 1 ton status

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    they will "work". I think it will lower the compression more than would be desireable though. Since 305s have 58cc heads and not more compression to my knowledge than a 350. The bigger 350 chambers would lower the compression.
     
  3. Z3PR

    Z3PR Banned

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    most 350's have 76cc heads. You could get lucky and get a set of 64cc heads, but those are hard to find today unless you go aftermarket. Keep in mind that a machine shop can plane down your heads to the desired cc.
     
  4. RustBuket

    RustBuket 1/2 ton status

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    Also, the bigger 2.02 intake valve version heads will not fit on a 305 as the cylinder is physically too small.
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Some 305s have 76cc heads. It will work fine.

    The '80s 305s with 58cc heads have up to 9.6:1 compression! Putting a better flowing, smaller chamber set of heads on them from a 350 may actually be an improvement.
     
  6. sled_dog

    sled_dog 1 ton status

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    THey can only be machined down so far. I know pontiac heads can only go about 10ccs smaller, don't know about chevys. As well the 2.02s could maybe fit on a 305 but there would have to be enough deck material to enlarge the area in the bore. I forget what this process is called. Not sure if it is doable on a 305. As well it would lower compression. But 2.02 heads same as 64cc are not very common
     

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