think about coke bottle rear end shape ,high nose ,complete set of peadls and pedalbox in CF ,Fabricated Gearbox housing in Steel and later Titanium , Not entirely sure but it could well be that he introduced cf suspension components.
And now for those who doubt:
His work was starting with :FDD GTO and B3 Technologies 2 times he persuaded Maranello to move all car design and critical parts manufacture to UK,TOM´s Toyota (later known as RTN now Lotus/Caterham development center,Benneton /Enstone now Renault err Lotus and Leafield formerly Arrows .his first step as a technical director was always to build a state of the art facility -you need a proper foundation to build top quality.all the high tech and systematic aproach is highly influenced by Barnard pushing the boundarys in the same ways as Senna and Prost were as drivers.
how much he had input in Mclarens facility back then ,I don´t know but sure he was instrumental in making ron dennis the man who formed Mclaren to the jewel producing the work of art in every detail year in year out.
His work in formula 1 started with Mclaren M23 and Parnelli btw..
Interview part 1 in vintage racer this month:
http://www.vintageracecar.com/pages/thi ... magiid=286