I'm talking about doing a gear swap in a rear axle costing $1000, that's why many find a replacement with the gear set of their choice and swap the entire thing.
A van is NOT a car, they lack the aerodynamics, apparently you haven't listened to what others are saying so go right ahead, you'll be wasting your money. BTW I had a dodge van with 2.54 gears, it was gutless, barely pull out of our steep driveway, and it was without overdrive, if it had, it'd have not been able to stay in it.