alright im doin the brakes on my 91 NA right now and i've run into this problem that i can get the caliper to open up to fit the new pads.

got the bottom bolt out to open up the caliper


but this bastard (right next to my index finger) that nut wont freakin come loose...


so a 2 part question....
1. am i doing the correct thing?

2. how the hell do i get that nut loose so i can get the caliper to accept the new pads?