Ok guys... 1972 Pontiac LeMans (A Body) have 10 bolt with 2.73s in it & it's whining... so replacing... Also... I am putting a LS T56 6 speed transmission in it.

I'm keeping the 400ci motor (for now), so I need to know where to look, what manufacture... etc...



Should I go limited slip or posi track? 3.73, 4.11...etc????? Help!

Thnks