I am unsettled about a torque arm front pivot design. Even after talking with S & W plus other racers, I still am not satisfied that a "poly" bushing at the front pivot is best.
I keep having this thought, "when installing ladder bars or four link, we use rod ends, not poly bushings. Why should this application be treated differently?" [of course, it is understood about the need for a pivoting shackle]
I know that other designs are on the market that do not use a poly bushing. Again, this is my thought, I like the design that uses a large, solid aluminum bushing. Here is an example of that design.
http://www.wolferacecraft.com/images...arm/fbtq43.jpg
[this design has two aluminum bushings, one in the bar and one in the shackle pivot. Both have grease fittings]
Also, I think it is very important for the torque arm crossmember to be very stable. As in the above post, it needs to be tight up against the floor and welded/braced in several spots. I also agree with the above post about using 2" x 2" tubing custom fitted for frame connectors, well braced/attached in several sports.
I am interested in the thoughts of others in ref to poly bushing or "other"