Big Block Suspension Question

I'm on the fence about doing tubular kmember, but I'm feeling like keeping the kmember stock is the way to go for me. Any big benefit other than weight savings?

If you are going to a BB, that QA1 K Member doesn't technically bolt right in. You would need conversion biscuit mounts to go from a SB to a BB.

I run a BB with QA1 upper arms, lower arms and strut rods along with Bilstein RCD shocks and PST 1.02" bars. It is a firm ride, but I have no complaints, so much better than the stock setup that I had. I just ordered a Hellwig sway bar to install as well, we'll see how much that helps too. Out back I have modified B Body SS springs that are inboarded for a mini tub with the same RCD Bilsteins. I want to do something with the springs, but not sure what, it rides good, but could use something a little firmer, maybe a rear sway bar as well.