Started to disassemble this bad boy today... manifold is almost plugged with tarr!


So everything was going great till about this point here
Looks like I found the exaust leak I was smelling inside the car!!!



This looks pretty bad to me, can this be welded up? What are my options...

I also have a clacking sound from the engine, looks like the hydraulic valve lifter,, How hard or easy of a job would it be to replace all of them?