1970 chevelle LS6 and L78 rear springs

[Mr70]

It actually should sit lower in the rear,then the front, originally.
Any idea what Part numbers are on the springs you used,or even what two Letter suffix tag they had?
What are your front & rear measurements at now?
Starting in 1969,they selected springs diiferently,using a Computerized selection process.It wasn't so much about an engine being an L34-L78-LS5-LS6,2DR or 4DR,or even convertible,but more about what options the vehicle was determined to be built with,Power steering,power brakes,AM/FM radio,Transmission,Door locks,A/C,etc.
If you have a buildsheet what is the sufix call out in those respective spring boxes #13 & #14?
If they are GB-GC-OO-OQ,it originally used Front #3960665,& Rear #3960652.
The Assembly manual only shows Standard Base Spring numbers,nothing more specific.