Welcome.
https://mountainoffroad.com/products/steering-brace-87-01-xj
I have this brace and an very happy with it. It's not nearly as beefy as the one you were looking at but the price isn't nearly as beefy either.
This is for an HO but if you look where torque and horsepower cross your at almost 2800 RPM. That is when it actually comes on. IMHO
My butt Dyno does says the bored throttle body helps.
OTC (7894) Jeep/Dodge Ball Joint Service Adapter https://www.amazon.com/dp/B0002SRGW0/ref=cm_sw_r_apan_glt_fabc_PJPRAAK2V4ME4E66F2ZS
Most of the large sets have them in the kit.
Astro Pneumatic Tool 7868 Master Ball Joint Adapter Set https://www.amazon.com/dp/B00061SGPO/ref=cm_sw_r_apan_glt_fabc_MJWKR07B6KK68RQ7JJSW?_encoding=UTF8&psc=1
This is the add on kit I have that also had them in it.
I bought a flange and added a piece of flex pipe where the convertor would have been.
Walker down pipe, my convertor replacement, Thrush muffler, and Walker tail pipe.