Power Steer Gear Removal
You'll never get the pitman arm off without a puller. Autozone will loan one for free, or you can buy one for around $10.00.
If you're rebuilding the front end spend the $60.00 dollars and replace the pitman arm.
A breaker bar is all that is really needed for the nut, but as stated above an impact makes short work of the job.
Regards,
Joe Dokes