Pitman for 440 in 68' Dart

Not sure why but I must have read somewhere that #3004809 was the correct pitman for the RB in a Dart. Mine has the 187 pan however still getting binding on left/right turn (can't remember which as car in winter lockdown with like 30 plus inches of snow.). Purchased the Borgeson 800126 box (can' get until covid restrictions fall, border issues). Would this be a good combination to eliminate the bind?