polyurethane

[glock36]

I'm rebuilding the suspension are these bushings the way to go?

[JohnZ]

They are if you don't mind more ride harshness and squeaking 

[rich69rs]

This time last winter, I had the sub frame out from the under the car and was going through the restoration process of everything from the front bumper to the end of the drive shaft.

I concur with JohnZ.  I used poly bushing in my 69 RS and the car handles very well.  It is stiffer, which in my opinion is very desirable.  However, although stiffer, it is not harsh - just firmer and improves the handling quality of the car.

Good luck with your project.