Torsion Bar and Shock compromise

Thanks for the thorough reply! Honestly 17’s are about perfect to my eye, and the Torque Thrust 2s would keep a similar look. I like the thought of keeping my drag radials and 15s for the track. I already cant hook up on the street even with the drag radials, so making the car safer and more fun on the street makes sense. Not to sound like a weakling, but my flaming river quick ratio manual steering box is already a chore. I’m thinking that with the upgraded rubber up front I will likely want to add the electronic power steering kit. Hopefully I can get the torque thrust with the propped BAckspacing. I used the Dr. Diff kit to run the later 11 3/4” discs up front, which apparently pushes the hub face out further.

The 11 3/4” disks widen the track the same as the regular 73+ disk brakes. It’s wider than drums or SBP disks but it’s nothing crazy, I use the 73+ disk width for all my recommendations.

I know what you mean with the fast ratio flaming river box. I run a flaming river fast ratio manual steering box on my daily driver Duster with 275/35/18’s though, and I run +6.5*’s of caster too - so it can be done. I don’t know that I would recommend it for most folks, but a 245/45/17 or even a 255/45/17 would be a big difference compared to 275’s. Less positive caster also makes a big difference, although I would try to stay in the +3 to +5* range with the QA1’s because it’s better for stability and counteracting the tendency of the wider front wheels to search out ruts.

You don’t make any mention of what rear axle you have. With your offset shackles if you have an A body 8 3/4 with BBP axles you could run these TT2’s front and rear with 245/45/17’s or even 255/45/17’s. Tire selection is a little better for the 245’s because it’s a very popular size, but there are good choices in 255 as well.

American Racing VN405 Custom Torq-Thrust II Polished Wheels VN405786555