Mark, my track only Pantera was set up by EJ Trivette and all suspension have .75 threaded rod ends into 1.0 OD threaded rods with .50 grade 8 bolts. After about 6 years of track use he is getting ready to replace all of them and the shocks (all from QA1) and realign and balance car. It is not cheap to run a track car!
Good Luck, Dave A.
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