the tubular k member is just the best thing ever, youll wonder how you worked on the car without it. as far as the a-arms, i only see the weight advantage to the stock pieces but saving every pound can add up so if you got the money go for them

 

mid/high 10's...hell I did that on stock heads, stock cam, stock tb, stock intake, stock 10 bolt. You don't need much power to go that fast with an auto.