Flex Plate: Pontiac 1977-79 Firebird TA With OLDS 403 V8- 77-78 ONLY - NOT 1979 Year Model::1977 use the Energy Unbreakable Polyurethane

use the Energy Unbreakable Polyurethane mounts option

Core Size  27 1/2 x 17 x 2 3/8 Rows  4 Tank Inlet  3 1/2 x 18 5/8 Tank Outlet  3 1/2 x 18 5/8 Inlet Connection  1 1/2 Top Left Outlet Connection  1 1/2 Bottom Right Mounting  Channel Transmission Oil Cooler  8 Construction  Copper Brass

makes it bigger then you may expect but so date

Should I also replace my condenser

Flex Plate: Pontiac 1977-79 Firebird TA With OLDS 403 V8- 77-78 ONLY - NOT 1979 Year Model::1977 use the Energy Unbreakable PolyurethaneThis 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