C3AE-F Heads

[JR 302GT]

I have a set of these heads. They say 289 on them also. Are these 1963 289ci heads? If so, is the combustion chamber size 54.5cc?

Thanks in advance,

John

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Altoona, PA 1993 GT, full MAC exhaust, 3.73, stock ported heads, E-303, ported stock intake, 65mm TB, 75mm Bullet, 24lb injectors.
Best E.T. of 13.48 @ 101.6 w/1.92 60'
Just installed MAC upper/lower control arms, Comp Engineering adjustable drag shocks, and Nitto 245/50-16 Drag Radials
The added suspension/tires really make a difference on the street without heating them, can't wait to get to the track with them.