I am running those towers with rear shocks from Ofna 9.5. You can get threaded or non-threaded. Can usually find them on E-bay. Only need 1 shock per corner. I am running 20W shock oil and it seems just about right.
Only recommended if you are going to race and not jump the house or something crazy like that.
I run Mugen Seiki MBX5 rear buggy shocks on all four corners of my Savage. I use a slightly heavier silicone, but I do not race...mostly a basher here. Great shocks.