automatic 727 modified / shifting issue?

CudaFactHackJob
They said while engine is off have someone push down on the gas pedal all the way and check the and adjust linkage if it has slack in it and then take it for a test drive and if need be readjust till it shifts right ? that yellow spring with the black stripe came from a mopar parts restoration website . its for a 340/ 360 small block in an abody factory muscle car with a 2 or 4 barrel carb . the red one came from the same place. I also had to cut and weld in an extension on the kick down rod .