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Re: 1973 Custom Classic 454 (Loss of Power)
No chance you have a 409. They have the oddly shaped heads like you said. Your 454 might be a different year, but it's definitely a BBC of some kind, not a 409. Just take one of your old plugs back there and see if they can get the part number for it. That will tell you a variety of engines it possibly could be.
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Steve
Member of the Foot Pedal Club
'83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL,
Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws,
350 HP 350 crate engine from Jegs, Turbo 400
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