That sweep pattern doesn't look to bad for a Mopar. You're right, the HS rocker arms are a little too long but you should be able to improve the situation by using lash caps.

Moving the rocker arm pivot down reduces the amount of scrubbing at high lift which reduces the friction. The lower pivot point will increase the total amount of scrubbing but that doesn't matter since most of the sideways travel occurs at low lift.

The old Chevy Power engine book recommends having the rocker arm perpendicular to the valve at 2/3 lift. That is lower than the 50% or mid-lift recommendation that is most common.