1966 273 2 barrel mods.
I have rebuilt and upgrade my 65 273.
The spec is as follows.
D4B Edelbrock intake, 4 bbl dual plain
Edelbrock 1406, 600 cfm carb
Comp Cam cam part # 20-246-4 Duration @ .015 270/270, duration @ .050 224/224, .313 lobe lift, valve lift .468/.468, 110 lobe separation
Electronic ignition
Domed pistons, comp. ratio of 10.5:1
Spitfire headers
Also put in front K-H disc brakes and a new three row radiator.
I am very pleased and the motor runs real good.