Rolling chassis is my usual with a twist on the running gear.
motor pod - Devised Designs slimline motor pod
motor - Scalextric FF050 red slim can, 20K
pinion - 9t, Fly March 761 F1
crown - 27t, Fly Lotus 79
front wheels/tires - Carrera Nascar, Carrera Chev 57
rear wheels/tires - Carrera Nascar, Shotgun Dave
guide - Sloting Plus
Got a flat greyish blue in mind for the finish.
Dan