When you say that you have new hinges, Do you mean the whole hinge assy. OR do you mean new hinge PIN kits? You can get hinge pin kits from Auto Zone. 1 kit fixes 1 door.
Yes, you can do this at home, in your garage, but you will need 2 people (1st person works, 2nd persons steadies the disconnected door). No, the dash does NOT need to come out IF you only change the hinge pins. Usually it's only the pins & bushings that go bad.
If you only change the pins, get a Sawz-All with a long metal cutting blade (I used a fine tooth wood cutting blade, & threw it away when I was done). The Sawz-All will cut throught the center of the pin in about 20 sec. Then you have to drive the pin halfs up & down throught the hinge bushings. Remove the old bushing with a chisel & long nose pliers. You will have to slightly drill out the bushing holes in the hinge (drill top 1st. then drill bottom THROUGH to top hole). I think the A/Z hinge kit has thicker bushings than OEM. The correct size drill is an Odd Ball size, and the kit does NOT tell you what drill to use. I used a dig. caliper on the bushings to figure out what size drill to use. What I remember is that the correct size drill, was between 2 sizes in my big drill index. Press the new bushings into the holes. Then move the door hinge half back into the body hinge half & tap the pins through. It will take some wigglin' & jigglin' to get the pins through both holes. The pins have a piointed tip to make them go through easier. There are C-clips that snap around the pins. Use the upper slot for the C-clips.
The 1st. hinge will take you a little while. The 2nd. hinge will go fairly quickly. I think the my 1st. hinge took about 2 hrs & the second about 30 min. Once you've done one, the 2nd is easy.
68COUGAR