Pain in the pitman

[James903]

I’m installing power steering on my 66. I’ve got a new steering box and a new 6143 pitman arm. I’m having issues getting the pitman on all the way. I can only get it about halfway on the splines of the steering box. Ive ruined a nut trying to tighten it down further on to the splines. I’ve tried a different steering box. I really don’t want to, but I’ve considered heating up the pitman arm and then hitting it with the impact. From what the parts store tells me and my research I have the correct pitman arm. I’ve installed plenty of pitman arms in the past on square bodys, which would basically be the same steering box and pitman arm. I just don’t get it