http://www.formulamotorsport.net/

The chassis was an easy choice.  I looked at the Formula Motorsport Plans and thought that the engineered strength and quality of production was very professional.  Also they are (march2006) currently in a build themselves.  I found having the build/design company in the same state very comforting as they will have to pass the same degree of scrutiny as myself.  Some states have their own individual idiosyncrasies. 

Check out this great 3D model that really lets you in on the chassis.  You may have to download the relevant plugin to make it work.

Link to 3D Chassis.   click here