273 Commando Piston Dome Volume

the specs in NHRA are supplied by mopar. they head volumes are same as listed by mopar from way back. the 273 has always been 57.3 cc. my 1966 spec sheet shows that volume. the dome volume was taken from a stock piston. NHRA does insure these things are correct. the chamber volume is for the closed chamber head 235/273. also, same for the 180/273 1964 to 1967. the dome volume does measure at 16 CC. BTW, the dome volume is in the engine blueprint section.