BEB's fail due to lack of oil (or as my understanding) so if u keep your oil delervery in good nick youllbe fine... you can baffel the sump to stop the oil sloshing around and starving the engine during cornering.
next weakest like? clutch, but once thats upgraded, your gearbox... youll lose 2nd gear on an agreasive launch with a heavy duty clutch easy, would pay to look at replacing your clutch when u do your engine anyway... its easy to do while the block is out