Which kit did you get? The snap together or glue together with all the extras?
Here are some links that might help:
http://www.speedracer.com/cars-mach5.htm
http://www.culttvman.com/mitch_leslie_s_mach_1.html
http://www.starshipmodeler.com/r&v/jj_mach5.htm
Go Go Speed Racer...