So I went to the junk yard today, the fenders are totally different, using the whole clip may still work I don't know. But! I did come across a 1984 buick regal four door. As I know the model is of a different class, I'm almost 100% certain the end of the fender lines are the same. I will take it later this week and find out for sure. This will give me the flat head light look as well as double head lights.
Hello, and welcome
The Lesabre and Caprice were both B body’s in 1983, so there are many interchangeable parts between them, but I would consider the body panels to be the least interchangeable. The body panels, trim, interiors, badging, and some equipment options are what define the differences between the Bbody’s of the era. You’d need the whole front clip and possibly the doors, to have a chance of getting them to line up and there’s a chance the pillar posts won’t match even then. I’m not a body panel expert (or any other kind of expert lol), but I would label that task as Herculean, not to mention expensive.
My understanding is that the 83 Lesabre came with 4, 4x6” sealed beam headlights. Dual filament (both low and high beam) on the outside, and single filament (high beam only) on the inside, just like the Regal did in 84. So I don’t understand what you’re trying to gain with “dual headlights”. The 84 Regal is a G body (formerly A body) and shares no body panels with B body’s. While all things are possible with enough will, desire, and expertise, I would categorise putting a Regal front end on a Lesabre as impossible for mere mortals. Find the right pro, and throw enough money at it.. maybe, but it would probably be less expensive to just buy a Caprice.
It’s your life, your car, and your money, so you get to do with them as you please, but from an expense/budget aspect, I’d probably celebrate the fact that it’s a good looking, stylish Buick, special in its own right. That’s just my opinion, and I’m sure the body pros will chime in and point out aspects that I am unaware of.
Welcome again, and I wish you luck and happiness building the B body of your dreams.
Peace