Question: I have three (3) Kodak Ektachrome 160 Super 8 (process EM-26, Type G) cartridges that are undeveloped. How difficult would it be for a complete amateur to develop these? If it is not very complicated or expensive, can someone detail how it would be done?

My humble thanks for your assistance.

Answer: 
Kodak Ektachrome 160G marked 'process EM26' can be processed in E6 chemistry, but it has a rem-jet anti-halation backing that must be removed. Ektachrome 160A will also process fine in E6. Both stocks will benefit from overexposure and shortened first development time. The earlier EM24 versions of this stock require a prehardening step and so cannot be processed at E6 temperature, but will work if all baths are kept at around 24°C and development time adjusted to compensate. Not really ideal for novices, there are a few labs in Europe that process this stock - Super 8 Reversal Lab in Netherlands (Frank Bruinsma), Dagie Brundert in Germany and Ricardo Pascucci at Bottega analogica, Italy.
My aunt had several of the cassettes of the Kodak type G Ektachrome 160 movie film, maybe 8 of them. As a gift I sent them to a place in hays KS called vision video. All 8 made about a 20 some minute long film on a CD and it costed me around $400