It seems that it`s time to redo the body seal on the drip rails of my 67. Is this a do it myselfer or is there more to it ?

If you are talking about the caulking between the drip rail and the roof, yes, there is more to it unless you are doing a paint job at the same time. If you are not doing a paint job, then it will look rather ugly even using a clear sealer.

Yes I am speaking of the roofline. No I wont be painting right away but the car is primered in several spots so as far as the looks......... I`m more concerned about tackling this project or letting a shop do it. I`m not incapable but I also dont want to try a new job on my car just to have to get it redone. Any advice is appreciated.

It's a relatively minor project. Here's my suggestions:
1. Remove the drip rail moldings or protect them with a double layer of duct tape.
2. Remove as much of the old sealer as possible with a small flat bladescrewdriver or similar tool.
3. Use a narrow wire wheel in your drill to remove the remainder of the old seam sealer.
4. When you have the old sealer removed, clean the area well, sand the groove and surrounding area to smooth out the screwdriver gouges and wire wheel marks. Apply a medium coat of primer.
5. When primer dries, carefully apply a bead of paintable, brushable seam sealer the length of the groove. Use your finger to flatten/smooth the sealer to the proper contour. Clean up any excess and make sure there are no "pinholes" along the edges at the drip rail or along the roof panel.
6. Allow the sealer to dry for about 24 hours, then apply additional coat(s) of primer as needed.

That should do the trick.

Thanks for the input, I`m going to have a go at it.