I looked up what BEB are. Although I've not done them on a Landcruiser, I have rebuilt a Triumph l6. I agree with others. It is a time consuming job to install the bearings. Plastiguage all the clearances, lube them before assembly, torque them in sequence, and double check all the torques prior to reassembly.
I've disassembled one motor where the con rod caps weren't torqued and the motor grenaded, and another where the caps were put on the wrong rods.
Long story short... Although messy, disassembly, and reassembly of the bottom end of a motor is easy (even the first time). Plasti-guage is virtually fool proof (squish and compare to chart). I'd not hesitate to do the job if I needed to.
The first motor I rebuilt was a formerly rebuilt & balanced Triumph Gt6 motor. Since then I've replaced the crank in the mower after it was bent (x2). To top it off, I figured it all out on my own, and didn't need any help.
Go for it... If the clearances aren't correct with the new bearings, the crank will likely Need to be machined so pull it and take it to a machine shop (JB did good work for me). All goes well, and it likely will, you'll be done on the weekend.