CPP powersteering conversion help

[westcoast5]

well I mounted up the conversion kit and everything works fine and all except for one thing. The truck turns way too far to the left now and doesnt turn enough to the right. 3.5 left and 1.5 turns to the right. the pitman arm sits slightly off center with the rack and you can only move it 90 degrees the way its splined. CPP says its the same pitman arm all years 63 and up. Does anyone have any sugestions on how I can fix this problem?

thanks