If you want some more in depth info on suspension, here are some books to check out:
Race Car Vehicle Dynamics By Bill and Doug Milliken
Theory Of Ground Vehicles by J.Y. Wong
Engineer to Win by Carroll Smith (more by this author)
Chassis Engineering/Chassis Design, Building & Tuning for High Performance Handling by Herb Adams
Competiton Car Suspension: Design, Construction, Tuning by Allan Staniforth
Fournier's "Metal Fabricator's Handbook."
"Fundamentals of Vehicle Dynamics" by Thomas Gillespie
I've been looking up some reading material so i can do up my frame properly and these are the books that i have found to be most mentioned/recommended. They are books that you have to buy (or find PDF's online) or you can look for them at your local library.