My recommendation is a long block from KDD well built with their brand new o-ringed heads. There's some lead time but from all the reviews it's worth the wait.
Trouble is you live in Commiefornia so you can't delete it unless you put the DPF back on every 2 yrs for smog, or register in a freer northern county that doesn't smog. Or even better move to the free country that lies east of you.
Personally I'd deal with the hassle of putting the DPF back on for smog and leave the engine killer off the rest of the time. https://killdevildiesel.com/collecti...roke-longblock
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2005 F250 CCSB KR 4x4 6.0 4" Flo-Pro,
Fox 2.0s, Toyo ATs, CTS2 Pro, Blue Spring, BPD 7.3 Fan Clutch, IPR Coolant Filter