Thanks for all the replies! I will check all these manufacturers out!
And as far as re-arching the springs, is there ever a concern of over fatiguing the spring where it might break?
Yes. Re-arching is a temporary band-aid. It does not last. Springs are made of.....wait for it.......spring steel. Spring steel has memory. Once that memory is gone is when a spring's life is over. Once springs sag, they HAVE experienced fatigue. Once re-arched, they will return to their fatigue shape much more quickly than they did originally.
Look around at stock 340 cars. See how you like those. They came with the XHD springs. What I would do is find a car that I like the looks of. If it's one with XHD springs, for example, I would order the XHD springs + 1". That way when they settle, you will be right on the money. All new springs settle "about" 1" give or take over a short period so I always take that into consideration. A lot of people do not and some are disappointed.
