Putting a bolt on car together and have the QA1 front set up for it along with BMR K-member, and A-arms but do not have any rear springs (other than stock). I have the 12 way QA1 shocks for the rear.

What is the recommendations? Someone mentioned Ground Control 125lbs springs, but not familiar with that.....

 

I use V6 springs

 

And be sure to swap the V6 springs side to side. Drivers to RH and Passenger to LH. Also put an air bag in the right side spring to allow some added preload if needed.

 

I run stock springs with a half a coil cut off the top and an air bag in the right one.
Shocks set at 6 left 7 right.

 

My set up (what I ran bolt-on & now) is stock springs all around, HAL shocks in the rear, stock shocks up front, BMR K-member w/lower A-arms, BMR adjustable pandard rod, BMR bolt on LCA relocation brackets, G2 LCAs, stock rear sway bar, no front sway bar, stock torque arm w/poly bushing.
60' times with bolt-ons were consistent 1.55 with a best of 1.53.
Hope that helps some.
Steve...