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Technical Mopar 340 AAR/TA heads 73cc?

Discussion in 'The Hokey Ass Message Board' started by mcmopar, Aug 6, 2019.

  1. mcmopar
    Joined: Nov 12, 2012
    Posts: 1,590

    mcmopar
    ALLIANCE MEMBER
    from Strum, wi

    I bought a 340 2 weeks ago and it had aar/ta heads and they are 73cc. The problem is I am not interested in the aar/ta head I want a aluminum head, but I cant find one with 73cc. The piston sticks up quite abit out of the head .170, it does have valve relief cut into the pistons. I believe that I have to have the 73cc chamber to use the pistons, who makes a aluminum head that I can use? trying to get this motor together for drag week. Yes the heads are for sale.
    Tony
     
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 47,179

    squirrel
    Member

    looks like the aftermarket heads are all designed for flat top pistons, eh?
     
  3. mcmopar
    Joined: Nov 12, 2012
    Posts: 1,590

    mcmopar
    ALLIANCE MEMBER
    from Strum, wi

    Yeah it sure does, it has Arias pistons, that I could adjust for a smaller chamber head, or buy new pistons. It also has a crane fireball cam. I could run it the way it is and see how it does.
     
  4. oldiron 440
    Joined: Dec 12, 2018
    Posts: 1,561

    oldiron 440
    Member

    Run the thing with the TA heads or sell to hole assembly.
     

  5. alphabet soup
    Joined: Jan 8, 2011
    Posts: 1,432

    alphabet soup
    ALLIANCE MEMBER

    You need to check for T-A after the casting number on the side of the block. If it's there you might have a few dollars on your hands. Gene.
     
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  6. mcmopar
    Joined: Nov 12, 2012
    Posts: 1,590

    mcmopar
    ALLIANCE MEMBER
    from Strum, wi

    It has adjustable rockers that are specific to the heads. The block is just a normal 1970 340 block. I don't have it together right now but I did get the heads back from shop today. They have the block for cleaning and magnafluxing . They are also checking crank and I will assemble. If there are any tips or tricks for assembly I would be willing to listen.
     
  7. squirrel
    Joined: Sep 23, 2004
    Posts: 47,179

    squirrel
    Member

    are the pushrod holes offset?
     
  8. mcmopar
    Joined: Nov 12, 2012
    Posts: 1,590

    mcmopar
    ALLIANCE MEMBER
    from Strum, wi

    kidcampbell71 and Deuces like this.
  9. squirrel
    Joined: Sep 23, 2004
    Posts: 47,179

    squirrel
    Member

    looks like they do have the offset pushrod holes. Neat...never seen any in real life.

    heads.jpg
     
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  10. Deuces likes this.
  11. alphabet soup
    Joined: Jan 8, 2011
    Posts: 1,432

    alphabet soup
    ALLIANCE MEMBER

    If I had this project...I think I would market the heads. I believe they would have more worth to a restorer. Don't really know about the pistons. But I will ask. I do know they need to be right up there to make any amount of compression. There is a head out there that my machine shop guy likes. I will get the name.
     
  12. Deuces
    Joined: Nov 3, 2009
    Posts: 19,269

    Deuces
    Member
    from Michigan

    060197_v3_1.jpg
    Edelbrock 340 cylinder head....
     
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  13. mcmopar
    Joined: Nov 12, 2012
    Posts: 1,590

    mcmopar
    ALLIANCE MEMBER
    from Strum, wi

    Jim, yes the pushrod holes are offset.

    Slayer, the pistons are aftermarket Arias, and have marks in the bottom to balance the whole assembly. There are no numbers on the pistons, so I am going to call and see if they can tell me anything.

    alphabet soup, heads are for sale, and I agree that some restorer would be more interested in them than I am. I am looking for something lighter.

    If anyone can tell me about the cam that would be great, cant find much info on line about it.

    Tony
     
  14. 26Troadster
    Joined: Nov 20, 2010
    Posts: 587

    26Troadster
    Member
    from Texas

    all i could find. i built a 360 for a buddy years ago and looked at this cam, but ended up going with the old direct connection 280º purple shaft.
    Crane Fireball #300A

    Should be .447" / .447" Lift with an advertised Duration of 300*

    Duration @ .050" = 222* to 232*
     
    Last edited: Aug 7, 2019
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  15. squirrel
    Joined: Sep 23, 2004
    Posts: 47,179

    squirrel
    Member

    If you have some idea what year the engine was built (perhaps the date code on a bearing insert) you could start a thread asking if anyone has a Crane catalog from that era, and give the numbers on the cam, and maybe someone will look it up and tell you the specs?

    Or maybe someone will look it up while I'm typing this. ;)
     
  16. upspirate
    Joined: Apr 15, 2012
    Posts: 2,232

    upspirate
    Member

    If you need a timing chain and sprocket set, I have a Mopar Performance P5249267 double roller set new in factory blister pack that I'm not going to use....PM if interested IMG_1476.JPG
     
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  17. mcmopar
    Joined: Nov 12, 2012
    Posts: 1,590

    mcmopar
    ALLIANCE MEMBER
    from Strum, wi

    Here is a rod bearing i pulled out. They way this motor is built it is close to a 400 hp street motor im guessing. 20190728_200504.jpeg

    Sent from my SM-G930V using The H.A.M.B. mobile app
     
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  18. mcmopar
    Joined: Nov 12, 2012
    Posts: 1,590

    mcmopar
    ALLIANCE MEMBER
    from Strum, wi

    I looked at them and the would work, but looking for a assembled set. I started looking at the trick flow 190, and they only have a 60cc chamber. It had a .040 head gasket, and I believe I could get a .060 gasket and make up the difference. I will have to puddy the cylinder. One down side I have is if I put head studs in and have to pull the head I would have to pull the stud to get it off. Are the ARP bolts just as good as the studs or do I have to go with the studs.
    Tony
     
  19. mcmopar
    Joined: Nov 12, 2012
    Posts: 1,590

    mcmopar
    ALLIANCE MEMBER
    from Strum, wi

    Got a present and more is showing up during the week. Trying to get it together for drag week. 20190818_130123.jpeg 20190818_130108.jpeg 20190818_130134.jpeg 20190818_130156.jpeg 20190818_130207.jpeg

    Sent from my SM-G930V using The H.A.M.B. mobile app
     
    loudbang likes this.
  20. DDDenny
    Joined: Feb 6, 2015
    Posts: 14,080

    DDDenny
    Member
    from oregon

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