Nylon/Poly Bushings

["Guy D. Huggins" <guy@genfiniti.com>]

List,
 
Does anyone have an experience in using the nylon/poly bushings in place
of the 
traditional bushings in the front and rear suspensions?  If so, are they
worth the
added costs?
 
Also, are they used with or in-place of the rubber bushings.  All of the
catalogs I
have do not make this clear.
 
What about the uprated springs?  Any thoughts or experiences with these?
 
Peace be with you!
 
Guy D. Huggins
 
1965 Triumph TR4A
CTC 63569LO
http://www.genfiniti.com/triumph/