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Hot Rods SBC Head Identifcation (again)

Discussion in 'The Hokey Ass Message Board' started by nd_siouxfan, Jan 22, 2019.

  1. nd_siouxfan
    Joined: Nov 11, 2014
    Posts: 2

    nd_siouxfan

    Found these on a combine at my fathers farm in ND. Combine is a 510 Massey with a plate that states GM 327. Thoughts on intake/exhaust diameters?

    Didn't get to pull the valve covers off to check casting #'s: It was -15 with a 20mph wind :)
     

    Attached Files:

  2. Key Cast Marks Cast Nos. Description
    A Rectangle 460 ‘55 & up 265/283 low comp (8:1) 1.72/1.50 valves
    B
    Narrow triangle over rectangle 520, 896 ‘58 & up 283 PowerPak/’57-’60 Fuel Inj.,9.25:1 CR, 1.72/1.50 valves, 59cc chamber; could be good replacement on late 305 but no accessory bosses.
    C
    Vertical bar over rectangle 997 ‘57 Corvette 270HP, 9.5:1 CR, chamber similar to PowerPak but with sharp corners in plug shroud area
    D
    2 vert bars over rect 997 ‘56 Corvette 2X4 bbl, 283; ‘58 pass car FI; chamber same as ‘57 270HP Corvette
    E, F
    Large “camel humps” 291, 461, 461X, 462 Original hi-perf or “fuelie” heads; chamber sizes are 62-64cc; both 1.94/1.50 & 2.02/1.60 valve versions available; 291 on 327’s thr ‘68; 291 have temp sender hole; 462 don't
    G
    Left-facing right triangle 041 ‘69-’70 350/300HP, accessory bolt holes, most have 1.94/1.50 valves
    H
    Small “camel humps” 186, 492 Later hi-perf or “fuelie” heads, some 186 (‘69 & later) & all 492 have accessory bolt holes; 1.94/1.50 or 2.02/1.60 valves; 64cc chambers; ‘70 LT1/Z28 use 492; avail as PN3987376
    I
    Large triangle over rectangle (“crown”) 882 Large chamber (76cc), hardened exhaust valve seats, compromised intake port(‘71-’76 350/400cid), best of lightweight heads
    J
    NONE 113 ‘86-’90 Corvette/ present 350-HO aluminum, no exhaust heat, 58cc chamber, 1.94/1.50 valves, centerbolt valve covers; good street head, ‘88-on have raised D ex port, 3/8 screw-in studs
    K
    3 right-facing “stairs” (“bench” on intake runner) 487 ‘71-’76 76cc, best large-chamber head; 1.94/1.50 & 2.02/1.60 valves available; latter machined for screw-in studs & guideplates
    L
    Right-facing “bench” 993 Common big-chamber head, not a lightweight casting; sim to 487; may have steam holes
    M
    One triangle 882 Alternative marking for 882; see I, above
    N
    2 triangles 624 Late-model lightweight casting version of 882
    O
    “Saddle” and vertical bar 416 Late-model 305, conventional valve covers, intake port not restricted; lightweight; 57cc chamb
    P
    Double (Captain’s) bars 193 Mid-’80’s style centerbolt cover with restrictive vane cast in intake port (hi-swirl); not recommended for high-performance applications
     
    Chucky likes this.
  3. BigDogSS
    Joined: Jan 8, 2009
    Posts: 904

    BigDogSS
    Member
    from SoCal

    Probably low compression and 1.72 intake/1.50 exhaust valves.
     

  4. Looks to like E/F which makes them "camel hump" fuelie heads, unless I'm missing something. Mitch.
     
  5. slowmotion
    Joined: Nov 21, 2011
    Posts: 3,271

    slowmotion
    Member

    I never seen a camel hump head where the humps were flat on top. If I was guessin', I'd say 'D'.
    [​IMG]
     
    427 sleeper likes this.
  6. SLOW, probably right I was looking at the slanted leg on the rectangle shape, doesn't really match D either now that I really look.
     
    slowmotion likes this.
  7. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,695

    56sedandelivery
    Member Emeritus

    How about that; a Corvette powered Massey-Ferguson combine. RARE 997 heads. Seems to me they were also used on some trucks (???). I am Butch/56sedandelivery/.
     
  8. 01mikep
    Joined: Jul 26, 2014
    Posts: 125

    01mikep
    Member
    from California

    My grandfather had two massy combines and both had 327's with 461 heads. Both combines were parked and awaiting to be hauled off when scrap steel was high. I took a look to see if the 327's would be good cores. I was surprised when I popped the valve covers and they were 461's.
     
    kidcampbell71 likes this.

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