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Some great information around the basics to verification of "Numbers Matching". Not trying to rain on anyone's parade, but there are also what are deemed original "reference examples", that are in a category far exceeding just simply numbers matching to collectible. They are those un-touched...

Very difficult for me to give a "quantifiable" this amount of hp difference between lightweight stuff vrs the far heavier 6 pack Pistons, given, I have not done any actual "side by side" Dyno testing ? Nonetheless, we have built & Dyno'd many nearly identical 440 Engines using lighter...

OK, Basically an identical parts list for both Engines, being; 440 Block stock 440 Forged Crank stock ly Rods W/ARP Bolts ICON 9953 Forged Pistons 5/64" Moly Rings Clevitte Main & Rod Bearings Durabond Cam Brgs ARP Main Studs MP Windage Tray Melling HV Oil Pump Cloyes T/Chain & Gearset Speed...

NOTHING wrong with a std inch 440 !! We recently did a couple of el cheapo 440 pump gas builds with Flat Tappet Cams, Stock LY Rods etc. We Dyno everything before it leaves, so I can dig up the sheets if you want ? * One came in at 490hp and 550 ft/lbs all in by 5,000 rpm(leave it in "D"...