Anyone familiar with the swapout concerns/steps to change out the "pumpkin" (ring/pinion, etc of the differential). Want to take the 3.91 setup that belongs to a crappy axle i have, and swap it into the 3.73 axle I am currently using. Don't want to have to fix the 3.91 axle and associated bushings...would like to get the pumpkin swap down to as little time as possible, so I can grab a 4.10 and swap between the three of them right at the race track during testing, to determine which one will suit me best at the specific track. Thanks as always.

Running an '85 244 B230F w/3.73, have a 3.31, 3.91, trying to find a 4.10