Pics of 4 link systems

Parallel is just a ladder bar with an adjustable instant center.

Do you need to adjust you instant center?
Not sure. Just toying with the idea. As I mentioned above I'm green when it comes to high perf rear suspensions and i'm looking for something that'll hook better and ride better. It also looks like it may give me a little more tire clearance that the leaf springs so I can get the next wider tire under it. I just found a book on Amazon I'm thinking about ordering. Seems Chris Alston has quite a bit of input on the subject so I think I can trust it

Thanks for your replies