Big Rig Chassis was from a 3 cylinder Fiat. Motor 4 cylinder Morris 1000cc side valve engine. The chassis is built up from square and rectangular mild steel tubing with wooden seat frame parts. It uses a Briggs and Stratton 3 HP stationary petrol engine which wasn't so suited because of the governor and centrifugal clutch arrangement. A washing machine gearbox connects the motor to the tail-shaft and the rear gearing is made from spider wheels out of a diff.
Steering box is a breast drill.
Brakes are a fixed v belt around a pulley on the axle. Suited for 3 to 8 yrs but really is a little fast for the younger ones. This was scaled from the full size T Ford although the driver sits on the back seat because of the scaling. The front suspension and steering is also scaled to the original so are quite detailed. The circuitry took a little time to develop as I wanted it to be foolproof.