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  1. 71340

    Here you go, Piston area and force.

    Just for clarification, going from a 4" piston to 5" piston is a 36% change not more than 50% as stated. 4" piston equals 12.56" in area 5" piston equals 19.63" in area, 12.56 divided by 19.63 equals .64 (minus the .64 from .100 to get the .36 (36%)
  2. 71340

    Does a '69 air cleaner look wrong on a '70 Dart Swinger 340

    get you a later model single snorkel (like photo), cut the snorkel off and elongate the hole and make a matching second hole to emulate the 70-71 air cleaner. Paint with texture paint and add pie pan. I have seen it done and it looks pretty good.
  3. 71340

    New Magnum heads?

    here is the response I got from the seller:   They are exactly as stated, new casting with factory reconditioned parts, just like all cylinder head rebuilders offer.   I think our price is probably better though.   Just let us know if we can be of help.   You can...
  4. 71340

    Best 273 and 318 builds (NO 360's please)

    Here is a nice build for a 318 i found on the web. "DODGE DART Swinger What Can I Do To My 318? The mild but spirited 318 combo The 318 can be an impressive performer. Start by getting the following books: Mopar Performance catalog, Mancini Racing catalog and HP Books How to...
  5. 71340

    347 (360 crank/318 block) roller cam regrind

    that looks like a nice cam. mind if i ask who you had do the work? i have a pre-magnum roller 318 I have been wanting to get this done to.
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