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#1
07-16-2026, 04:20 PM
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63-66 Pontiac N 421 crank 9770488
Was told this was nos when previous owner got it many years ago with some Trophy 389 parts. it is def standard standard and shows no signs of being in an engine. 4" stroke, 3.25" mains, 2.25" Pontiac rod journal n crank. My assumption is this was a later parts run as the part number is partially hand stamped.
Needs a polish but was stored in a dry basement. This will Fit in any 421/428/455 block. Crank about is 1/2" shorter but the balancer registers on the crank gear. Match your timing cover to your balancer and everything works. Pics Coming $700 Plus shipping
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1968 firebird cameo white on red 400 4 speed 1969 carousel red firebird 455, richmond 5 speed 1964 gto pump gas, 505 IA2 EHeads, EFI, 92 mm turbo ice cream getter in process now.... 1970 lemans hardtop, gto clone Atoll Blue 1972 Maverick powered by 2004 gto ls1 and t56 6 speed, 8.8, fox strut front end, wifes car |
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#2
07-17-2026, 09:35 AM
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Crank pic
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1968 firebird cameo white on red 400 4 speed 1969 carousel red firebird 455, richmond 5 speed 1964 gto pump gas, 505 IA2 EHeads, EFI, 92 mm turbo ice cream getter in process now.... 1970 lemans hardtop, gto clone Atoll Blue 1972 Maverick powered by 2004 gto ls1 and t56 6 speed, 8.8, fox strut front end, wifes car |
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