Ss spring tuning

I have a 67 dart weighs 3300 lbs
Has 002 003 springs
Rancho 9 way adjustable shock
Springs moved to frame rail.
28 inch nitto drag radials
Manual trans.
4.30 gear ratio

When accelerating from a slow crawl the Car hooks very hard with little to no spin from the tires.

The problem being is that the cars rear end seems to kick out to the right when hooking. It's not kicking out a lot but enough to notice. What should I adjust to straighten out the kick to the right?
Is it a shock setting?
If I recall from last year I have the shocks set at full firm on both sides. Do I soften the one side shock to help straighten out?