Subframe connectors?

I'm planning on taking my Duster to the track this summer ( Edelbrock head 440, 727 & 3.91s) The cars pulls way harder than my 12.20 sec. small block Scamp, So I'm hoping for super low 12s or high 11s, So my question is, At what performance level do subframe connectors become neccessary ? the car hooks like mad on the street with 295-55-15 M/T et streets.