I am ready to install my a arms and my new spindles, but I need some help with installing the spring. From looking in the book, they say to use a spring compressor to do the job, but I don't have one. I was wondering if there was a way to do it w/o a spring compressor. I was thinking I could compress the springs by using the weight of the truck, but my engine is not in the truck, so there is no weight to compress the springs. Help....