Cams for 318's

340 cam
Intake Duration, Nominal 268° about .008
Exhaust Duration, Nominal 276°

Intake Duration @ .050” 208° some say 209 or 210
Exhaust Duration @ .050” 214°

Installed Centerlins
Intake Lobe Centerline 112° ATDC
Exhaust Lobe Centerline 116° BTDC
Lobe Separation Angle 114°

Overlap 44° @.008 WITH 114lca
Note: as installed on 112° intake lobe centerline per Chrysler
Intake Opens 22° BTDC Intake Closes 66° ABDC
Exhaust Opens 74° BBDC Exhaust Closes 22° ATDC

Intake Lift .429"
Exhaust Lift .444"

Note: original high-performance 340 4bbl. cam LATER CAMS VARY NOT 68 STICK CAM
from Chrysler High Performance Cam Data
you can go to above and compare intake close data and see how a larger cam can have a similar intake close at the expense of more overlap

Direct connection small block cams

p4529963 .521 lift

p4529970 .526 lift


STX21-105. 305 duration

336/348 duration DC


P3412016 - for a small block......Cam # was ST21-108
Duration - 28x?? my data sheet has a bad spot on the third digit, sorry
Lift - 0.520" (at the valve)
Centerline - 110*
Lash intake - .018"
Lash exhaust - .022"
Recommended spring - P3412068


.533 p/n4529317

The biggest hydraulic was the .533/320. That was a rowdy hydraulic grind.


Chrysler High Performance Cam Data