Can anybody point me towards a good information source on 3 link suspension?

I bought an asphalt modified chassis that had been rear clipped and the 3 link that was on it won't be legal to sport mod rules.  (I am NOT running this car on dirt, it is still going to be an asphalt car, but the rules are mostly copied from IMCA NSM.)  

I just need a basic idea of what should go where and how, and what changing things (bar angles, etc) will do.

Thanks.