305 heads over 350 block

Discussion in 'High Performance Modifications' started by ace4z28, Jan 25, 2008.

  1. ace4z28

    ace4z28 New Member

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    Jan 25, 2008
    Mesquite,TX
    Purchase an 1980 3/4 ton chevy truck, after checking casting numbers found it had 305 heads (1.84/1.50-58cc) on a 350 block (#14010207-4bolt). Do not know what to do. Want to upgrade cam/ lifters/ rocker arms to roller. Want good proformance HELP!!


    Casting number #14014416 &14014418 on heads
     
    Last edited: Jan 25, 2008
  2. 77RS

    77RS Veteran Member NastyZ28 Sponsor NazstyZ28 Sponsor Lifetime Gold Member

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    Oct 18, 2006
    Asheboro, NC
    Just curious... what is the casting number on the heads? Are those the swirl port heads?

    Welcome to NastyZ28!
     
  3. ace4z28

    ace4z28 New Member

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    Jan 25, 2008
    Mesquite,TX
    Casting numbers

    The casting numbers on the 305 heads are 14014416 &14014418, with 58 cc chambers
     
  4. -=79z28=-

    -=79z28=- Veteran Member Lifetime Gold Member

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    Jan 22, 2008
    Charlotte, NC
    same thing i am doing on my car, it has a 305 in it and i'm going to use the 58cc heads, but you have to get four relief flat top pistons for pump gas compression (10.1:1-10.3:1), or go with dish tops that will get you into the low 9's (9.2 to 9.5 to 1), i've done some research because of this already and with a comp 280H cam, the 305 heads (ported), and 10.25:1 compression, edelbrock performer dual-plane intake, 750 cfm (quadrajet), and long-tube headers, it was making an estimated 375 hp at 5000, and 425 ft. lbs. of torque at 3500, is this the performance you were looking for?
     
  5. pdq67

    pdq67 BANNED

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    -416 heads are good one's that should have squared off chambers like smog heads whereas the -601's are like the double quench, closed chambered heads, the early -461 "Fuelie" heads of old!!

    I have both the -601's and the -461's out in the garage.

    pdq67
     
  6. -=79z28=-

    -=79z28=- Veteran Member Lifetime Gold Member

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    Jan 22, 2008
    Charlotte, NC
    awesome! i have a set of 601's on my 86 chevy c-10, but, its a 305, its a pretty powerful one after getting the block decked, must have added a little more compression and a crane 256H cam
     
  7. pdq67

    pdq67 BANNED

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    Columbia, MO, USA
    Imho, the old 305HO, -601's are VERY good small engine heads, but you have to CC them to know for sure what your CR will end up at.

    Suckers can be down to 52 cc's and probably up to 58!!

    CC them so you will know for sure!!

    1.84"/1.50" valves, hardened seats, an eff. double quench closed chamber and 160 cc ports!!

    GOOD HEADS by me!!

    My pair cc'd at 53 and 55.......

    pdq67
     
    Last edited: Jan 27, 2008
  8. Cataldo

    Cataldo Veteran Member Lifetime Gold Member

    So how are thoughs 305 heads? i have a pair off of a '79 305.
     
  9. 77RS

    77RS Veteran Member NastyZ28 Sponsor NazstyZ28 Sponsor Lifetime Gold Member

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    Oct 18, 2006
    Asheboro, NC
    Where did you find pistons to fit the 305 (3.736") bore?
     
  10. mJolnir

    mJolnir Veteran Member

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    summit
     

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