Grigg, thanks for the direction. I read but did not retain that (per Sister Mary Grace 3rd grade).
Knowing that has anyone used this kit and does it supply the needed "bulk". My old part looks a lot bigger, pie shaped with the point down and about an 1.5 inches thick all the way through to contact.
Perhaps reinforce the floor and install 2 per side. Install one and shim it down any experience with this.
The cone shaped ones just look a little weak at tip, contact might be 3/4 square inches, at best, whereas contact on original would have been 1.5X1= 1.5 sq inches. More compression might lead to more movement, different ride height, early failure of center mount, any opinions welcome, thanks Jim D


pictures below
https://picasaweb.google.com/111413431667404132006
Jim D - '48 GMC 1ton pickup