Re: Rear suspension question
It's been a long time since I had it done but I have had rear leaf springs re-arched and an extra leaf added. You really need to price around because I found a huge difference in pricing. You also need to get a garage that speciallizes in suspension.
The last vehicle I had done was a 1988 Jeep Cherokee. I bought front coil springs but need them installed. I priced around and found one company would install the front springs, re-arch the rear springs and added an extra leaf. It was quite a while ago but it cost $350 to have it all done. It was pre-1992.