Bans25

Hi all,
I am about to buy a new 7 leaf for my 78' and I noticed that the base plate for the spring is warped pretty bad... What one should I buy, I see them advertised, but are they all the same? Are some better qual than others?
I don't want to be picky, but the one that is in there now is pretty bad..

thanks much..
-Bill

P.s. What is the torque that should be put on the rear spring bolts?