It’s as simple as any normal car stereo swap, the radios can be swapped with out removing the top, if you do wish to work under the top alone just remove the 2 nuts on the front mounts and the two on the side mounts, then loosen the two rear nuts till they are at the end of the threads, then you can tilt the front of the top up and support it with a short rod or 2 by. Keeping the rear nuts on the mounts will keep the top from accidentally coming off the tractor, then to swap out the speakers you can switch the nuts to the front mounts and raise the back of the cab top.