This is tough one, the problem is there were few Yellow versions, check this
http://www.hf-integrale.co.uk/Gallery.htm
The giallo II version has racing type seats but Ronald Holzer edition has regular seats as well as Giallo Ferrari version. So it is realy up to you to chose what you like.
Edit: oh and here is third solution
http://www.l-m.co.uk/lm2001/articles/integrale.html