Yup that's what I'd use, unless you're good at mental arithmetic.
You won't be that ****ed with such little volume. If that's all you're going to do on the main lifts, then make sure you do at least 4*8 or 5*6 in the other exercises as heavy as you can to just about complete all of them, else you will get nowhere fast.
BBB is good for getting used to the weights too - as your weights increase doing your BBB routine weights will increase. I'm not suggesting doing 5 sets - but hey, do your rests for a strict 45-60s and you can get those out in under 10 minutes - then just do 3*8 on the subsidiary exercises.
The key is spending time with the heavier weights and getting used to repping out.