Started work on fuselage bottom. Drilled and clecoed L angles and Z angles. Received note from Zenith about what I thought was incorrect parts. Tunes out since the 650 and the 750 share the same firewall parts and they are selling more 750's than 650's, they sient the correct parts but they did not change the parts label. So it appeared that I had 750 parts. Shirley at Zenith says they have now added 650 labels to these parts now so this shouild not happen to the next 650 customer.