340 6-pack cam specs?

Found this on E Bodies.com specific to factory cams not necessarily yours but you could do some measuring and compare.
Specific to factory spec 340 cams;
Automatic-equipped 340's employed a hydraulic cam with 268/276-degrees advertised duration and .429/.444-inch lift.
70 Challengers with a 340, 4 barrel and 6 paks used the same cam.
it had some healthy duration at .050.
- advertised, 268/276*, at 50' , 228/235* with 114 deg separation for a wide 5800 rpm power band and 44 degree's of noticeable overlap