CalTracks - Rear Leaf Spring Question

I need to install new leaf springs in the rear of my 71 Demon, 8.75, 727 and 5.7 Gen III swap. I am looking at using the Caltracks single mono leaf. I like the idea of adjustable ride height, loss of 28 lbs and vehicle stance. I have priced them and they are roughly $180 more than a pair of MP leafs (Summit).

My rear has a DocDiff 1/2 shackle offset

Has anyone used used only the springs without the bars? Pro's, Con's and insights would be greatly appreciated.

Car may see track time, but really a cruiser, some spirited driving and the occasional ingestion of tuners or other roadworthy prey.

Thanks