Hi THOUR- Myself and a couple of more guys are running 292's in pulling tractors. We turn 6000 rpm's with on problems. There has been no problems with crank or rods. Two of them are stock bottom ends with no mods. and one is the Mex. crank and engine with no mods. except ARP rod bolts and been balanced. Know of one engine that turns 7000 regularly and has had no problems out of the bottom end. The only mishap I have heard of is a guy that had alum. rods. a rod broke and caused major damage. We also run heavy custom built flywheels. We check bearings at least once a year- have had no excessive bearing wear on the mains. The only problem we have had is slipping the outer ring on the balancers. One guy has taken everything off a stock balancer(he does not run the alt. or water pump off the pully). I run a v-8 balancer(8 in.)off a 350. The pulley runs off the hub not the balancer. We haven't had any trouble since back in May. The stock bottom ends of these engines are tough.
