I just bought a NOS mopar direct connection purple shaft cam and lifter set from a friend for cheap. I am concerned with the duration being too high and sacrificing low end torque. First off, it's going in a .040 over 360 with slightly more compression than stock. This motor is going in my W350 which has an automatic and 4.10 gears. The part number is P4286671. The duration is 272. The overlap is 48. Lift is .455"/.455". Recommended installation centerline is 108. What can I expect out of this cam?