Impala shocks for a c3500 dually???

[Jeeperguy]

So I'm new to these trucks and just picked up one and cant figure out the right shocks to use with a belltech 5/7 on a 1996 gmc 3500 dually. Reading all kinds of stuff and there's too many options. Looks like it has some kind of aftermarket lowered shocks on it now. Looking for a better ride. It has a firestone bag kit and c notched frame. I just ordered shock mount extensions and was curious if anyone runs these impala shocks that I read about?? If so what year or part #. Eventually gonna do a complete air ride system.

 

[Pappawolff11]

this is the set I have that I am going to put on my truck. https://www.belltech.com/belltech-street-performance-shock-set-lowered-9522.html