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  1. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    It’s a 61030. I need to get the head cleaned and checked for cracks. It’s pretty corroded. The end freeze plug was totally rusted through. The pistons (100) don’t look bad. The cylinder walls have some surface rust but no signs of pitting, and no significant ring ridges that I can detect...
  2. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    I pulled the head. It’s a 61030 with domed pistons. TBD if the head is good (no cracks) or if the block is going to need to be bored. I was just trying to understand the options if the block did need to be bored given that the domed pistons in a O/S are NLA to my knowledge.
  3. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    61030
  4. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    Love the thread @FJ40Jim
  5. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    This gasket?? Looks unusual… Toyota?
  6. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    Where did you get the head gasket on your block?
  7. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    Yeah, I came to the conclusion that the best thing to do would be to rebuild what I have with the original block, head, pistons and valves if things are still good and within tolerances. I pulled the head and I don’t detect any significant ring ridge, so if the head, block and valves can be...
  8. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    Wow… that really looks great. Are those the original pistons and valves? Did you just clean and hone the block? What did you have done to the head?
  9. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    Is there a demand for used domed pistons and open chamber heads? Can I sell the parts and keep the block and crank?
  10. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    I’ve heard that you need to do that.
  11. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    What is "NLA"? From everything I have read, the domed piston was used to make up for the larger chamber, which was made to increase flow for smog purposes, but it lowered compression and created a larger quench area. The Closed chamber and flat pistons had a smaller, more efficient quench...
  12. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    I don't know for certain... I picked up the engine recently not knowing the year. I cleaned off the SN (2F 037791) and from the MUD Spreadsheet determined it was a 1975 Engine. I'm going with the assumption it's an open chamber with domed pistons. I'm just wondering if I should be thinking...
  13. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    I’m not trying to build a muscle car. I just want to build a respectable 2F with good low end torque. I understand that the open chamber heads with domed pistons have a lower compression than the closed/flat and we’re designed primarily for smog control. If I’m going to rebuild a 2F I want...
  14. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    So you (and Whatley) are saying that the Closed Chamber Heads, milled to raised compression, and Flat Head Pistons provide the highest compression 2F engine, correct?
  15. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    Interesting concept. Certainly less expensive but it would present challenges installing it.
  16. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    Mark Whatley wrote this in 2006. Can anyone help me understand what Mark is saying about the trade off between using the ‘75 (“early”) head versus the “later” (years?) head to achieve higher compression? I have a ‘75 2F I’m looking at rebuilding and I’m wondering if this comment from Mark...
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