My 289 currently has a 302 head on the passenger side and a 289 head on the drivers side (I don't know how it got that way either). What is the cc's (volume) of the combustion chambers on the stock 289 4-V heads?

 

I don't have a clue, can anyone her help me?

 

probably 58 i think, or
did they raise them to 64...........