Just ordered MSD fuel Module and primary/secondary springs from VFJ. I asked what he reccomended spring-wise for my rig but I cant remember what he said. I just said "ok send me that!" I know his rep and he wouldnt steer me wrong. My question is does anyone have a similar setup with MSD and springs and how much low end difference can I expect? Also im pretty savvy with mechanics but how hard are these springs to install? Will I need any special tools?