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Replacing 292 engine with a 312

Discussion in '1955 - 1966 Classic Ford Thunderbird' started by IronHorseDriver, Apr 16, 2017.

  1. Hey Folks,

    Newbie here. I have been looking for a '57 restoration project, and I recently got a lead on a 57 that had been disassembled and partially restored. Most of the parts need to be reinstalled--something that is well within my ability (provided I can find good parts and service manuals that can help me). Anyway, the current owner pulled out the original 292 and had a 312 engine custom built. He said it was bored out to 335 c.i.d. and assembled with aluminum heads. My question for this forum is whether the 312 is a drop-in replacement for the 292, or if I will need to have new mounts installed/welded on to the frame.

    If anyone on this forum has done this engine swap I would appreciate any input.
     
  2. Exact drop inuses same mounts. Why change it. The 312 was a much sought after engine and has a lot more power and does not take away from the price of the car. The 312 was an upgrade and was a standard engine in that car.
     
  3. Thanks. I went to look at the car today and the owner stated that it originally had the 312 ("D" Bird), then it was downgraded (before he owned it) to a 292. When he began the restoration a number of years ago, he obtained a 312 which was souped up to 335 c.i.d. and aluminum heads.
     
  4. the "Y" block engines, 272, 292 and 312 are all easily interchangeable.
     
  5. Are the 239 and 255 also interchangeable?
     
  6. I would say yes because they too are "Y" block engines. I think the larger 292 and 312 would be more readily available.
     

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