I have a 1983 6.9 idi that won’t start anymore. The I’ve narrowed down the cause with all the troubleshooting I know. This all started when I was testing the 4x4 after I bought it. I drove through what I thought was a puddle and ended up being a 5 foot pond. Engine hydro locked. I dropped the clutch a few times on the dirt while it was getting winched onto the tow truck. Long story short I got the water out and it fired up, but seemed to only be running on 7 or maybe even 6 cylinders. The IP has been fully rebuilt and installed. I’ve verified and went through the trouble of being 100% positive the IP timing marks are lined up by removing the front cover. After this defeat, I decided it was time for head gaskets, but upon removing both valve covers, I noticed cylinder #2 had what I understand to be 7.3 rocker arms on it. And cylinders #1 and #8 have broken rocker bridges. When I turn the engine over with the starter, it sounds like I’m losing compression in a cylinder because the starter speeds up. Would these broken rocker bridges have something relatable to my issues? All I could think it would be would be: bent valve, head gaskets, piston rings and sleeves (since they were filled with dirty water), or maybe I’m dumb and it’s just old injectors. Any input is appreciated.