Is there an aftermarket heater core?
I can not find an aftermarket heater core anywhere, lots of A/C evaporators, but no heater cores. Is this car too old to have a heater core?

The Mazda 929 was totally redesigned for 1992. The body was restyled to be more rounded and modern-looking, and the wheelbase grew more than five inches. The engine got more power, and driver- and passenger-side airbags were now available.
The Mazda 929 only came in one trim level, but it was well-equipped, with a sunroof, power everything, and air conditioning. The engine was a 3.0-liter, 195 horsepower V6. Fuel economy was 19/24.
Drivers like the 1992 929 because it is roomy and comfortable, handles well, and is very reliable. Many drivers find the interior to be lacking in many features like cup holders and a glove box. In the event that the 929 does need repairs, the parts can be expensive.
I can not find an aftermarket heater core anywhere, lots of A/C evaporators, but no heater cores. Is this car too old to have a heater core?
Where should the positive cable go to from the battery?
My car is ticking and someone told me that i had the wrong type of oil in my car. What type of oil do i need to use?
Air Conditioning
Automatic climate control front air conditioning
Airbags
Dual front airbags
Audio System
Antenna Type: power · Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Steering wheel trim: leather
Convenience Features
Multi-function remote: trunk release · Steering wheel: tilt-adjustable · Steering wheel mounted controls: audio
Mirrors
Exterior mirrors: power
Roof
Moonroof: power glass · Sunroof: solar panel
Seats
Front seat type: bucket · Heated: front seats · Upholstery: cloth
Tires and Rims
Wheel type: aluminum alloy
Windows
Front wipers: intermittent