I'm just finishing up rebuilding the front suspension on my 67 Coronet. I installed the greaseable lower control arm pivot shaft and Poly bushings from PST. I think you're supposed to use a silicone-based grease on Poly bushings. What type of grease is everyone using on the greaseable pivot shafts? Can you the same grease on the upper and lower ball joints, and tie road ends as the pivot shafts?