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421 H.O. Tri-Power Engine Build - Part 2

This is a discussion on 421 H.O. Tri-Power Engine Build - Part 2 within the Firebird / WS6 forums, part of the Vehicle Specific category; 421 H.O. Tri-Power Engine Build - Part 2 Finding 100 horses in a 421 H.O. Tri-Power equipped Pontiac hot rod. ...

  1. #1
    Blown, Stroked, & Sprayed

    Ed Blown Vert's Avatar
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    Aug 1999
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    383 Procharged & N20 Vert


  2. #2
    Former Mopar Man 2002ssslp's Avatar
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    Jun 2011
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    Branchville, NJ
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    02 Camaro SS, 04 GTO

    I ran against these engines back in the late 70's in my 1968 Dodge Charger R/T with a hot 440 Magnum. Those Catalina's were big and heavy but with that multi carb'ed 421 mill they would do high 12's all day long. Most of the SD Cat's had 4 speed's and my Charger had the super reliable and consistent Fairbanks built A727 TorqueFlite trans so I won more then I lost in heavy eliminator class at E-Town. I had great respect for those big Poncho mills, if they had a decent 3 speed auto trans they would have dominated the heavy class.
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

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