My old man had tried it on his 63 Thunderbolt in the late 70s ......Yes I wish I had that car. ....I vaguely remember the car he sold it in 80 , it was always a hand full to drive....not because of power it just didn't track straight always wanted to go left, before and after the leaf link set up.
here's good thread that has some useful info
https://www.jalopyjournal.com/forum/threads/leaf-link-suspensions-learn-me-something.293268/

1963 Thunderbolt 496FE 10.80 (still a work in progress)
1968 Mustang slow a$$ 428 FE
1971 Boss 351 Mustang 11.20@115mph
1993 Lightning 10.61 @ 129mph 408Ci A3 headed NA
1996 Viper GTS
2001 Lightning 8.99 @ 155MPH 5.4 Mod Motor
2009 Ram 9.65@144MPH 463CI G3 NA
2010 Challenger 9.91 @ 139MPH 408CI G3ci NA
2019 F150 (local dealer's Lightning package) ..11.90s