Best way to remove rivets from frame?

[johnymac]

I need to remove 6 rivets from my frame in order to install my new shock relocator kit and a front sway bar on my 67 C10.

I am curious what methods have been used in removing these rivets?
I hear drill them out, or use a cutting wheel on a drill, grind them off, not sure which might be the easiest.
I am going to try and tackle soon, my power tool collection is shall we say lacking.

I have a friend with a portable air compressor, I was thinking maybe buying an air drill.

Can anyone suggest the best way to remove these before I start buying any tools.

Thanks very much!!