Lost, get a second opinion from a different mechanic.Couple of cases I had to deal with .
"you need a new engine" =2 broken valve springs and slight oil contamination. Simple head job.
"You have water in the oil.= cracked head.Replace head and change oil
" you were towed in, we dont know whats...
standard cooling system with no upper hoses
Looking at the diagram your missing the hoses to the riser, not allowing water to exit and cool untill the Tstat is open
Did they install the wrong oil pump ,a hi-vol instead of a reg normal pump.
Defective by-pass spring reliefe.
A hi-vol oil pump requires atleast a 12 Qt pan lest you lose oil at the high rpm`s
remove the inlet tube and attempt to pass a wire thru it. If the wire does not pass thru, unscrew the alum tube from the alum fitting and remove the screen
With number 1 at TDC compression you line up the rotor tip to where number plug wire is at the cap. Most have it at #1 on the cap.Some put it anywhere and jumble the plug wires to match
Firing order is 1,8,4,3,6,5,7,2 clockwise
It combines the port and stbd battery systems together to start atleast 1 motor. Usually a Ford type solenoid with battery cables connected to both starters.