'77 Impala

[Impala Matt]

I am running the SPC adjustable upper A-arms with the greaseable
steel-on-steel "race" style bushings. At some point they quite taking grease and would only push the grease gun off the zerk. When i took them apart 3 of the 4 wouldn't push grease through the small hole in the cross shaft even with the bushing off. The shaft and the bushing are to worn to use and I am going to replace them. I am trying to decide if I should replace them with the same or switch the rubber bushed "street" style. SPC says dirt can clog up the small hole and prevent proper greasing. They recomend disassembley and cleaning
often. Anyone have a similar experiance with these on the street and
will I be dissapointed if I change to the "street" style.