Got a radiator from a supposed 70 camaro z car that has the following letters. I A ...X H...B F....4...anyone got a clue as to what they mean? Thanks! Bill. Appreciate it!

I think they used those to match the radiator to the broadcast sheet. They used different radiators for how the car was eqipped. (example: engine size, automatic or standard, air conditioning ect.)

[B]Thanks...I was told that a 446 sq inch unit came from a 402 not a Z28, but was wondering how he got that info?