#2658920 {1966 and 1967 } '273' Castings
Intake Port.......... 1.05" Wide x 2.07" Height
Volume............... 124 CC's
Exhaust Port....... 1.14" Wide x 1.59" Height
Volume.............. 61 CC's
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#2843675 {1968 and 1969} '273' Castings
#2843675 {1968 thru 1974} '318' Castings
Intake Port......... 1.05" Wide x 2.07" Height
Volume.............. 125 CC's
Exhaust Port....... 1.14" Wide x 1.59" Height
Volume.............. 61 CC's
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#2531984 'X' {1968 thru 1970} '340' Castings
Intake Port.......... 1.16" Wide x 2.27" Height
Volume............... 160 CC's
Exhaust Port........ 1.25" Wide x 1.75" Height
Volume............... 70 CC's
