Hi Pete
And welcome to Traction world. Your size should not be a problem as for a publicity stunt Citroen squeezed a Polish count into a Traction and he was over 7 foot tall, not sure whether he drove it but he did work for Citroen. Slough built cars did come in two sizes, the Light 15 and the larger Big 15 although the latter are not so common, the even larger Familial and Comercial were not built at Slough.
Cheers Richard
Richard Larter