Flex Plate: Pontiac 1977-79 Firebird TA With OLDS 403 V8- 77-78 ONLY - NOT 1979 Year Model::1977 these are a duplicate of

these are a duplicate of the factory 1/4's that you have not been able to buy for over a decade anyway

These distributors DO have vacuum advance for finer tuning

otherwise you'll likely stuff it real fast etc

This is a genuine GM USA supplied replacement part for Olds and Pontiac V8 pre 1982 era & later 80's early 90's Corvettes where used

GM New Metal cover

Flex Plate: Pontiac 1977-79 Firebird TA With OLDS 403 V8- 77-78 ONLY - NOT 1979 Year Model::1977 these are a duplicate ofThis is the correct Olds 403 Flex plate replacement new unit for the 77 78 1979 is different so be sure of your year please. Diameter (IN) 1. 161 Diameter (MM) 348. 175 Mounting Hole Diameter 11. 5 in Outside Diameter 13. 938 IN Pitch Flywheels 12 to 14 SFI Approved No SFI Certification Sticker Included No Teeth 166 Tooth Quantity 166