I'm not the desiner of the home made trac bar, but I think I can answer. First, each different chassis needs a separate design, at least as far as the mounting of a pan-hard rod (trac bar). Second, an independent front suspension like the P30 is a totally different suspension than the leaf spring & solid axle of the W20/W22 or Ford F53. I not even sure a trac bar is a good idea for that type of suspension - I'll leave that question to someone more expert in independent suspensions than I.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL