Grab a 6.0L or 5.3L and Ls swap it lol if you do keep it. 5.7 hemi.. Great engine.. bad design. UTG has a good break down on the “why”. They eat Cams. Just Sucks.
https://m.youtube.com/watch?v=dI93-Zdx_nY
https://m.youtube.com/watch?v=iTL8QEU2NwE
Hope it’s something simple but knowing the “hemi tic”, it most likely isn’t.