Some cars leave a paper trail; the Dallara SF14 left a name and a place in Dallara's list. What follows is what can be said with a source behind it. Its designer of record is Walter Biasatti.
Where it came from
The Dallara SF14 is a single-seater open-wheel racing car chassis designed and built by the Italian company Dallara. It was the exclusive chassis for the Japanese Super Formula series from the 2014 season through the 2018 season, after which it was replaced by the Dallara SF19.
Under the skin
it is rated at 550 bhp. Kerb weight is 660 kg. Power-to-weight lands near 833 horsepower per tonne, which is hypercar territory, where the limiting factor is the tyre, not the engine. The wheelbase is 3165 mm. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
In context
Where it sits in Dallara's history is not in doubt: the Swift FN09 came before it; the Dallara SF19 followed it. Nearby in the Dallara catalogue sit the Dallara 320 and the Dallara F191.