Tube Chassis - Main Hoop to Foot Box, is 37" wide at the bottom. Is 1 1/2" x .095 DOM for all upper tubes, the Low Main Rails are 3" x 1 1/2" x .120 wall, weight is about 250 lbs. This dose not really matter for WRL because the Weight to HP is 9 to 1, that would be 183 HP at 1650 lbs. I think, You need enough weight to have enough HP to push through the Air. Front suspension pick-ups for Miata A-Arms & Miata Rack are tacked on. Use Whatever Front Suspension you would like. Use whatever Mid drive train you would like, a Side-Winder Front Wheel Drive is good, Make whatever Body Work you like, Use a 3/16" Lexan Windscreen, use 1/8" for a template first. I use Aluminum for the Car's Under Tray, use whatever you like. It will take me 1 month to fab your Tack Welded Chassis, you really do not want an old guy welding your chassis, right? All "Joints" are fully welded under each other & a 3/32" Vent Hole is drilled, you can purge with pure Argon. Weld with a MIG with Good Quality ER-70 x .30" Wire And Connect The Gaps With a TIG using the Same ER-70 Wire --- Finish With a TIG ---- See my facebook group " 1600cc Sports Racer " a few pics are there. Thanks