Isx cm870 rebuild

[Darrenfarmer]

I have a 2009 peterbilt with a cm870 its been chnaged from a cm871 by someone at some point it was a cheap farm truck worked ok head leaked oil ans hard start cranks way longer than any isx iv been near so i did head gasket it sealed up nicely then exhaust clamp turned at some point and got the oil cooler housing well someone got it hot and it had lots of blow by but ran ok so i changed oil cooler housing i used cummins plug kit but the engine didnt last long it got a bad knock so we parked it well this winter i pulled engine out as i wanted to find out what made the noise it broke number 5 liner it was in the pan there is some damage to block where rod has hit but i think it be ok but i need to check more but can this 450hp st be rebuilt to a 565 or 600 spec inside its serial number is 14044078 thanks