just installed the PST greasable ones on my 71. . along w/ their lower control arm stiffening plates, plus poly bushings thru out front end components, & QA1 tubular upper control arms , For rear suspension... I went w HOTCHKIS lowering leaf springs w/matching FOX shocks for them, ( Made A Huge Difference... UGE!!! ) Also have the HOTCHKIS frame connectors that I will install soon!