Oh, absolutely. I’ve never used anything bigger than a 6, but driven a few 40k# 4WD tractors that are putting down 6 or 700 hp with much smaller displacement engines than that, though I wonder about comparative duty cycles since they’ll never see more than about 7-10k hours before an overhaul. I also see 3406s with way more hours than that without rebuilds, or maybe just a cylinder done in their lifetimes.