The center section is a direct swap- - - -no need to change the axle housing or brakes. The HO-52 and HO-72 center sections do not interchange parts, but the complete centerpiece is a bolt-in swap.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!