Ss springs, caltracks, monoleaf what to choose

i have a 68barracuda with qa1 front kit and leafsprings with pinionsnubber ,Qa1 rear shocks, 28x11,5 worked well with a small block in.
I going to have a 512 pumpgas engine in it now pg and 4:56 and think it will be traction issues, what woul be the recomended rear choose to get the car hooked at the track?what does the racers do? 4 link?guess it would be a mid 9 sek car, also heard leaf link is good?

First , don t be disappointed about not running mid nines , if its a street car, unless its boosted some way , BIG tires needed too.
I have caltracks on mine and not overly impressed with them ---------but haven`t messed w/ them a whole lot , had some other problems at the same time ..