looking at putting in a set of dropped springs in my 62 olds. i see that most companies only offer 2 inch dropped springs as a rule of thumb, but i found a guy who would make them in any drop i want BUT... i'm wondering if at some point the car becomes impossible to align or creates some other problem in the front end. i have yet to crawl under the car to see how far i can go and still be drivable, but i want to have all the information in my head while i'm figuring things out. thanks.
2" is as far as you can go and be driveable. You only have about 6 or 7 inches of clearance to start with. Drop it more than 2" add a couple of fat friends and a trunk full of baggage and you will be dragging the ground over every pot hole, man hole cover, driveway and gas station entrance.
I cut 1 and a half coils out of the front of my '61, which is the same ch***is as your '62 and it gave me an inch of suspension travel before the stops. It rarely bottoms out though, and absolutely no bump steer issues. I'm transplanting in a SBC so the front end will come up a bit then too!
I have 3" drop Springs installed in my 62 Starfire. Ordered them at coilsprings.com. They told me less drop would be better. I didn´t listen. It sits very low and drives ok with original tire diameter, but bottoms out often on rough streets. What tires do you want to run? If I put on my 14" rims with radial tires it sits lowerr and bottoms out much more. I also think that the car is lower with every year on the street. Have a friend with a 59 Buick and 3" lower springs how has the same experiance with his suspension. He then put Rubber Spacers under the springs to lift the car a bit again, after few years with those he´s now thinking about new springs again. I wouldn´t go lower than 2" or maybe 2,5" if I would buy new springs now.