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SBC Block interchange?

Discussion in 'The Hokey Ass Message Board' started by Relay, Jun 30, 2006.

  1. Relay
    Joined: Apr 21, 2006
    Posts: 304

    Relay
    Member

    i've got an 84 small block 350 that came out of a corvette... the block is bad i also have a 66 chevy small block 327, i was wondering how many parts are interchangeable? crank... heads etc? any info would be helpfull. thanks -Riley
     
  2. scottybaccus
    Joined: Mar 13, 2006
    Posts: 4,109

    scottybaccus
    Member

    Go to mortec.com and start reading. It will help some.
     
  3. crank will not interchange , `84 350 crank has large journals and the `66 327 has small

    the heads will bolt on , but may mess up your compression ratio....the `84 probabilly has very small combustion camber with dished pistons , the `66 has flat top pistons
     
  4. Relay
    Joined: Apr 21, 2006
    Posts: 304

    Relay
    Member


    i belive this 327 is a large journal block if it is does that make a difference?
     
  5. justanova
    Joined: Jun 30, 2006
    Posts: 11

    justanova
    Member

    measure the rod journal, if it is a small journal it will measure 2.0 inches if it is a large journal it will be 2.1 inches.

    84 still has a 2pc rear main seal if I remember correctly so If the crank is a large journal everything should interchange.

    fwiw I would build the 327, probably has a steel crank and they like to spin a little harder.

    what exactly do you want to swap around?
     
  6. Relay
    Joined: Apr 21, 2006
    Posts: 304

    Relay
    Member

    pretty much the crank rods, possibly the cam depending on the readings i get off it more then likely im going to hock the cam though, other then that just all the minor things that nickle and dime you to death

    ill be changing the intake, pistons, heads, and a possible cam.
     
  7. jerry
    Joined: Mar 2, 2001
    Posts: 3,469

    jerry
    Member

    If it's a big journal you can make another 327 using a later 350 block. Just have to use the 327 pistons because of the sroke.


    jerry
     
  8. 32chevysedan
    Joined: Jun 11, 2006
    Posts: 377

    32chevysedan
    Member
    from Texas

    You can tell if it is a steel crank by the parting line on the front of the crank by the snout. If it is really thin then it is a cast crankshaft, but if it is wide then it is a steel crank. Any way you can still make a awesome engine and a cast crank will hold 500hp. and about 6,500 rpm's
     
  9. tomslik
    Joined: Mar 3, 2001
    Posts: 2,161

    tomslik
    Member

    large journal 327's were a 68-69 thing ONLY.
    66 will be a small journal.
    is it a chevyII block?
    they b different.....
    oil filter pad is higher on the block(as in not level with the oil pan surface)

    if so, sell it!
    and go buy a crate motor (or something)with the $$$ it'll bring
     

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