Thread: flywheel for 454

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gm and any one that makes a fly wheel have different part numbers for a 454 and 400 they are both external wheels .BUT THEY ARE NOT THE SAME IF SO GM AND ANY ONE THAT MAKE THEM WOULD SELL ONE PART NUMBER THEY DO NOT .I DO THIS STUFF FOR A INCOME I HAVE BALANCE ENGINE AND PUT HEAVY METAL IN CRANKS I DO NOT CARE IF YOU WANT TO TRY IT BUT A 454 WHEEL IS NOT THE SAME AS A 400 WILL IT WORK? WELL IT COULD . I LIKE TO GET ANY THING I BUILD AS CLOSE AS I CAN 1TO1/2 A GRAM. IT WILL NOT BE WITH A 400 FLY WHEEL ON A 454 OR A 454 WITH A400 FLYWHEEL. NOW DO NOT TAKE MY WORD JUST LOOK IN A GM PARTS BOOK OR ANY ONE THAT SELL FLY WHEELS .YOU NEVER TOLD ME WHAT 454 WHEEL. YOU DO KNOW THERE TWO WHEELS FOR THE MARK4 AND 6 SO WHAT WHEEL WORKS ON A 400SBC? WELL THE PART NUMBERS ARE NOT THE SAME OR THE COUNTER WEIGHT GM #3986394 CLUTCH DIA 11. RING TEETH 168 FOR SBC EX 400..gm 454 WHEELS 3963537 .3993827 HAVE FUN GOOD LUCK