Fastest Duster on stockish suspension?

Looking to build a track Duster into the Tens.

On stockish factory suspension with either a big or small-block set-up?

Whats your best on rear springs, no tubs?

Is their a crossover between super revvy SB to grunty BB...

Not a street car just Fun days at the track lol.

HNY to all in A Bod-land