1990 manual b2200 axel diameter

whats up i looked in the search and the only one i found every one had different thoughts.. ordering brackets right now and need to know the rear axle diameter for the lower bag brackets.. thanks.. is it 3in. or 2.75 those were the most common.. 1990 b2200 2.2 manual tranny..

your best bet would be to messure it yourself. could be either or, or diferent