Since I was having to come back to this thread every time I’ve decided to tweak with my 60’s line’s car, I’ve put a “quick” guide together, with the informations from this thread. Thanks kmBlaine for the info!
TL;DR GUIDE TO 60’S AMERICAN CARS
Panel Material: Steel (Aluminium on cargo vans and sports cars)
Chassis type: Ladder (Unibody on small/pony cars)
Chassis Material: Steel
Engine Placement: Front Longitudinal (Mid Longitudinal on race cars)
Front Suspension: Double Wishbone (Solid axle leaf on trucks/vans, coil on jeeps)
Rear Suspension: Solid Axle (Double Wishbone for sports cars)
Engine Block: Straight 6 or 90º V8
Block Material: Cast Iron
Displacement: 3 to 4.5l for I6, 4 to 8l for V8, 5 to 15 mm larger bore than stroke
Head and Valves: Pushrod, 2 valves
Head Material: Cast Iron (Maybe Aluminium on race cars)
Crank: Cast Iron Crossplane
Valvetrain quality may be raised.
Fuel System: Carburetor
Configuration: 1 BBL - base I6, 2 BBL - common I6 and V8, 4 BBL - high trim, 2x4 or 3x2 BBL - high performance
Fuel: Super Leaded - 98 RON
Fuel Mixture: Racing 4 BBL - 11.8:1, Performance 4 BBL - 12:1, 2 and 4 BBL economy - 13.5:1 to 12.5:1, 1BBL - 13.5:1
RPM Limit: 4000 to 5000 RPM for common engines, 6000 rpm for sport motors
Drive Type: Longitudinal RWD (Optional 4X4 to off-roaders and upper trim trucks)
Gearbox: 3 speed manual: Base for most cars
4 speed manual: Optional for high performance luxury cars, base for high-end sports, optional for others.
5 speed manual: Race cars only
2 speed automatic: Optional on small and mid-size, and entry level large cars.
3 speed automatic: Base for luxury cars, optional on others.
Top speed: Final drive gears between 2,5:1 to 4.0:1, shorter for trucks/off-roaders
Spacing: Tight, below 70
Differentials: Open as default, lockers for tow packages
Tyre Type: By target market
Tyre Choice: Usually Hard Long Life
Tire Width: 165 - 185 mm for compact cars
185 - 205 mm for mid size cars
205 - 225 mm for full size cars
215+ mm for limousines
Parameters: 13" for compact cars
14" for mid/full size cars
15" for limousines
15",16",18" for trucks and off-roaders
1"+ optional for all classes
80-90 sidewalls
Rim Material: Steel, Mag/Alloy optional on high performance cars
Brakes: 2SL front, SLS rear, front discs optional on late 60s
Sizes: 250-275 mm
Interior: Bench seats rear, Bench or bucket front
Entretaintment: Entry: Radios not standard until the late 60s. Optional mid/large cars in early 1960s,small in the mid 60s.
Stick the Basic or Standard radio options
Premium: Radios not standard until the mid 1960s. Generally optional in the early years.
Stick to Standard or Premium radio options
Luxury: Radios standard even in the early years. 8-track started becoming optional in the late 1960s.
Stick to Luxury options
Steering: Manual as standart on small cars, hidraulic as optional, standart on mid/large cars circa 1963
Springs: Standart, progressive optional on trucks, off-roaders and commercial vehicles.
Dampers: Twin-Tube, Gas Monotube optional on sports cars
Sway Bars Tuned to 0% at rear(non existent),maybe existent on front to induce understeer
Springs: Around 1.0 Hz spring frequency. NEVER BELOW 1.0 Hz
Dampers: 0.2 - 0.3 dampening coeficients