It's a 1 banana job...
/emoticons/
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Un-bolt steering shaft fr. box....it should telescope up & out of the way.
Pitman arm puller can be borrowed fr. Autozone. ( a must)
Tires straight & pitman arm should be pointing straight back. (you can mark/note its position & set the new one the same. (Some pitman arms will only go on in one position.)
R & R the box...line up the pitman arm & torque nut. re-install str. shaft.
Double check everything & check that str. wheel is centered. B)