If you want to be authentic, then you should use Nendo. Then you will understand the limitations they had to deal with back then.
If you can not find a licence for Nendo, there is an application called Wings 3D that is a carbon copy of Nendo.
Some other interesting trivia:
Reality Co-Processor @ 62.5 MHz
640 × 480
16.8 million color palette
4:3 aspect ratio.