Fuck yeah Mr Mac!
I have never installed an old school hard wood floor but I have done some remodels where we had to replace a fair amount of the stuff.
There is two tools you can't do without,
1. a good chopsaw with a fine blade in it
2. a stand up air nailer.
Buy the chopsaw, rent the nailer. A chopsaw will prove to be a valued tool for years to come.
Don't even fuck around with the one that looks like a staple gun. You will be on your knees enough doing this job.
Whats you subfloor look like?