I need to drop the rear of my 70 at least three inches. Rather than putting the drop blocks under the car, was considering dearching. I called a spring shop today and they said they can do it. What do I need to know before I make a decision on this? I was reading that Rick Flores is running the 17x11 TTII wheel with the 315/35-17 tires. He said he had his springs dearched 3" and then had a 1" drop blck installed to get the ride height shown below. So tell me about dearching. Does it leave the spring strength intact or ? Any reasons why I shouldn't dearch?