i have done this a couple different ways. inside the can is a collar that sits on the shock tupe that the spring sits on. find some rigid tubing and add a piece about 2" long. this will compress the spring and lower the front. you may have to play with the length to achieve the desired height. or, there is a wooden spacer in there somewhere(been a while, i think it was wood), you can cut this in about half and the front will sit lower. tear down a strut and it should make sense. do one at a time so you have a reference to how they are assembled.