I adjusted the vac. modulator and it firmed up the shift on my 400 trans, but I want the shift pointshigher at WOT, it is shifting out of second at 38 mph, I want it to run up to around 45-50mph before shifting into 3rd, so I was told i need to adjust the governor on the trans, but what do I need to do? add wieghts, delete wieghts, change springs, or swap governors? I have no idea. need some guidence.