Complex sentence: The Longchamp was a coupe version of the Deauville model, using a shortened Deauville wheelbas; these two models are the only front-engined cars made by De Tomaso.
Split into simpler sentences: The Longchamp was basically a coupe version of the Deauville model, using a shortened Deauville wheelbase. These two models are the only front-engined cars made by De Tomaso.