Be sure that the old shells if re-used are clean and smooth.
Get extra teflon grease with the bushings, the stuff they sell is really a very sticky thick grease, and have him use it liberally on the sleeve, the poly bushing outer and inner races and coat the center bushing outside before sliding it in.
the extra $ for the extra grease tubes is well worth it!
Also have him lube the sides of the poly and the brackets before sliding them into place.
be liberal with the grease, rather than stingy. 2+ years, going thru 3rd winter in the NE, daily driver, all poly all around, and not one squeek.
[This message has been edited by tjm4fun (edited 01-13-2008).]