The difference is one is a Chevy & the other is a Pontiac.

Firebirds weighed more than Camaros.

Pontiac had there own rear axles for most of them.

Different interior. Dash boards are different. 69 Firebird dash looks closer to a 67-68 Camaro dash. Angle of the sheet metal.

Most parts will interchange between the two.

MBHD


12 port SDS EFI