Well, sometimes I get a bit annoyed about people who don't know the history of AMC perpetuating myths, and get carried away in the "corrective" posts. They were as good a company as the bigger ones, just not big enough to compete head to head. In today's world (which started in the 60s) you have to be able to build a minimum of 100,000 of one model to benefit from the economy of so many -- spread the cost over that many. Not only that, but you want as many parts as possible to work for as many models as possible for even better economy of scale. Remember when cars changed major designs every three years at least? Now it's 5-10, with the exception of a few high end models. Anyway, there's nothing wrong with the existing front end design. It's light and strong. The old 196 OHV six weighs only 50-60 pounds less than a V-8, and the Rambler V-8 models used the same design with just a heavier spring. The old GEN-1 AMC V-8 (or Rambler V-8 if you prefer) was closer to the weight and physical size of a big block! It's possible that lowering plates would cause a problem with the spring. The spring does sit just above the tire. The plates will move the tire out a bit, but not much. No one that I know of has done a coil-over conversion, but it's pretty easy. I'd cut a round 1/4" steel plate that would fit in the upper spring seat then weld tow "ears" on it that the upper eye of the shock would fit between, the ears drilled for a bolt to run through the upper shock mount. Drill two holes in the top of the spring tower and thread two corresponding holes in the plate for 1/4" bolts to hold the plate in place when the car is jacked up. The lower spring mount is threaded onto the upper trunnion. Remove the spring and screw the mount off. Cut the mount right below the spring seat and weld a U shaped piece of metal that will wrap around the lower shock mount. The tube below the actual spring seat is pretty tall and can be shortened or lengthened as needed to fit the coil-over shock in. Don't try to use the stock shock mount. It's not made to carry the entire weight of the car. You could re-work it a bit and correct that, but would need to beef up the lower control arm too. Moving the spring to the lower arm will mean you have to look at beefing up all kinds of things -- the lower arm bushings may not like it either. Everything was designed to take the weight directly over the steering knuckle -- the other parts just keep the knuckle standing up. Handling would be adversely affected too -- the high spring mount is very roll resistant. Sixties cars are usually softly sprung and roll a bit as it is due to the rougher roads back then. A bit stiffer springs on a high spring car will do more to improve handling than adding a sway bar. An air spring could be mounted the same way. You could probably use a rear type spring that folds in on itself in the front with a diameter that would fit up into the spring tower. Then the lower mount could be lengthened to fit. Only problem is that type spring might be too tall to gain any clearance.