I know my sig says poly all around and I was going to do it but I've been thinking about a few things. If I'm not going to LEGALLY road race it will I see any benifit from it? If I poly instead of rubber am I going to lose ride quality? I already have 620s and 5 leaf springs out back? I want to be able to hook up the best I can will raceing shackles with poly help that? I mean if I'm going to poly I'm going to replace every piece of rubber with it.