Front End Clunk

[85Silverado]

Ok, i posted a thread a like 3 weeks ago about a frontend clunk i'd get whenever I took off from a stop and occasionally going down the road and taking left turns. I jacked up the front of the truck and checked for play in the balljoints and there was none, no slop in the steering, but all the grease points looked like they haven't had any grease in a while so I greased them up and continued looking. checked for a crack on the steering box mounting point cause i heard they tend to develop them, tho i'm not sure if that's for 2wd or for 4wd, but i checked anyways and didn't see one. Anyways, I set the truck back down and went on my way and it didn't clunk anymore. Well...that was 3 weeks ago and now the clunk is back. I didn't do anything but hit all the grease fitting with some grease, I really didn't think it was gonna make a difference but apparently it did.

A friend said that my control arm bushings could be shot on the drivers side, and i'm thinking that could possibly be true. We jacked the truck back up and the drivers side suspension creaked while it was going up till it was at full droop. So what do you guys think? How much would it be at a shop to get the control arm bushings fixed? Thanks for any info.