Convince me to put a TKX in my Dart
For my TKO swap you had to cut it back about that at far anyway. You can always re-weld the replacement hoop back in. My kit is the defunct Hurst kit but Holley still sells the loop. Below show what they had you do. The new .188" thick hoop was way stronger than the factory stamped one. We sub-framed my car at the same time which also helps
Install Overview: Hurst Driveline Conversions Tremec TKO Kit for 67-76 Mopar A-Body