seeking recomendations for a towing vehicle that will seat 7

The Excursion is going to come at a premium price when compared to a full size van. Unless you need 4wd, stick to a van. The image you can't see that APT posted is an excel spreadsheet with gear ratios and RPM, and yes, it must be on your end as I see it. the point he is trying to make there is to get the 6 speed auto and 6.0L engine and not worry so much about the axle ratio.