Ive got a 62 merc monterey. Whats the best spring to lower it 2in and still have a nice ride? Dont want to cut em, anyone?
It's hard to name a spring since none are really purpose built. You can pull one of your coils out to check the dimensions and rate, then use that info in choosing a new replacement. Measure the height of the spring installed at ride height, normally loaded. Measure the height out of the car. Use weights from a weight bench to compress the coil 1 inch and you will know your current rate. Take the difference between the free height and loaded height, multiplied by the rate and you know your corner weight. Measure the diameter of the coil. Grab a circle track catalog and look for a spring length, diameter and rate that will arrive at a 2" shorter installed height with your known weight. They should run $50-$75 each.
Not knowing if your asking about front or rear, leafs or coils so I will give you the best way for each. For rear leaf springs you can use lowering blocks (between the axle housings and leaf springs) if they are underslung or either way have the springs de-arched. This process is better than lowering blocks, doesn't affect spring rate and you can achieve any ride height you want (up until you hit the bottoming rubbers). For coil springs you can heat the bottom coil and lay it down a bit to achieve the desired height. This does not affect spring rate but care must be taken not to get too aggressive and remember if your doing this yourself to block the vehicle before you heat the coil and to account for some settling after things cool and you drive it. Cutting a coil does increase a coil springs rate but sometimes this is a good thing as it keeps the vehicle from bottoming out as easily now that the clearance has been reduced from lowering.
The 49-51 Ford and Merc guys have been using springs for a 90 Ford Aerostar van. Perfect fit and 2" drop. Hope this helps.