[Bobboloo]

You can get a new welder for $300 on Ebay that will do everything you need. I bought a 110V Clarke for that much and it works fine. If I was a pro then a Millermatic 250V would be the way to go but for my uses the Clarke has been more than adequate.

There's no glue holding the Targa band but some gasket sealant may be causing it to stick. Lifting it from the window side should cause the sealant to give. Have you unbolted it from the rear quarter panel? There are two studs on either side that go through the quarter panel. Be sure to spray them with penetrating oil and let them soak, They get rusted and can break quite easy so easy does it.

You can get the plastic clips on the dash to release by pinching them from the underside of the dash but truthfully at their age they usually are brittle and end up breaking. Replacements can be ordered. Make sure you have all the studs un-bolted. There's usually one or two you don't see if it's your first time doing this.