Here are the translations of the notes on the Body Box and Framerail Sketches. Since so many people seem to be unable to work out the notes, we have typed out what's written on the sketches. We have to say: This doesn't bode well for one's problem-solving skills if these simplest of steps are causing problems already, but here you are. We wish you all luck when it comes to the drivetrain.
Seat bottom, seat back, hood top, grill front, and box bottom are attached between 1/4" (or 3/8") box sides with 1" screws and 1" quarter-round molding stringers. First assembly is without glue. Then trims for box sides along bottom, seat top, and grill are marked to suit design.
Box is disassembled, parts trimmed, and box reassembled with glue.
(cut and drilled, then attached to body box to assemble)
Rails have 1X4's ripped to fit inside about 12" in both ends.
Axle holes through rails: Drill 1/4" pilot holes through, angled back to about 3° to follow path of axle. Then drill out with 1 1/2" holesaw so axle can clear.
Flat 1X3 rail material sitting flat against bottom of siderails.
Welded extension for engine mount if needed.
Through bolted. (come on people; you should be able to figure out that one...)
Body Box Sides (cut two opposites, 1/4" ply)
Cut out for steering.
58" 1 1/2" or 1 5/8" tubing or light pipe.
U-bolt
"Exhaust pipes" are needed for torsional rigidity of body box.
Curve cut on bandsaw metal blade or jigsaw.
Bottom trimmed to suit design.
Mock frame kick-up cut from 3/4" ply and 1/4" ply sandwich.
Drill frame holes 1" from top and bottom, staggered, and 7" apart.
Drill frame holes through with 1/4" bit. Then redrill outside with 5/16" bit for 1 1/2" X 1/4" roundhead bolts.