Here is an extensively modified Ferrari 290MM body kit which was turned into a 750 Monza as raced by Fon Portago in the final edition of La Carrera Panamericana. 
A single plastic exhaust (with exposed muffler) is used on the left hand side – and the exposed tail pipe is aluminium tube attached to the chassis. And in an effort to keep the look of this model period any temptation to lower or slam the body was snuffed – there is room above the motor to lower the body – but that would just not look right.
This model in its current configuration utilizes an 18k Ninco large can motor for competition in the SP+ class. The added RPM (and torque) offset its overall weight (115g) to make this model perform and handle exceptionally well. 
“Look Ma – No Screws!” The body is attached to the chassis using one of my favourite methods – hinged side pods glued to balsa wood (epoxy) – using piano wire sleeved with brass tube inside brass tube on either side… 
The beauty is that all you need to do to remove the body is pull out the flexible wire tabs from brass tubes attached to the rear bushing uprights… no screws to fiddle with, work loose or lose on track…
Just a simple wire/brass chassis with your basic .032″ brass tongue front end and flat brass motor bracket to allow the motor/pinion to be swapped out. All of these parts were made using household hand tools although a trip to the garage to the drill press would have been quicker… square Parma oilite bushings were used at the rear. The angled wire braces on either side of the motor sit very tight to the motor giving the chassis added stiffness. The motor itself is angled slightly downwards towards the front of the chassis, both to lower the COG and to ensure the pinion is properly lined up with the crown gear. 
Round oilite bushings holding the front axle are reinforced with a ‘chuck’ bar soldered to each bushing and to the brass plate. The guide is a clone of the Ninco classic guide made by DArt. Crown gear is slot.it 28t, axles are professor motor, a DuBro #2 washer is soldered to the end of the front axle for independents, all four wheels are modified BWA, inserts and urethane tires are DArt – the tires are the club series tamper proof marked DArt CT0101 tire using a 1/8″ white dot through the meat… which were leftovers from a past MiniGrid order.
…gearing and motor can yet be changed to increase performance – this chassis should be able to comfortably handle any motor up to 25k… and one day it might… :good:
The Happy Canadian Scale Modeler!
