Bought a 96 lagecy outback off Craigslist. homeboy said they replaced HG,timing kit, belts and water pump at 160k did the rad shortly after. Well he didn't lie, but he didn't put the right gasket on. I'm pretty sure it was six star mls gasket nice gasket wrong engine. My question is now that the engine is out what should I replace,and how much do i trust in previous fixes. Obviously the HG (OEM only) and heads resurfaced. How far in to the engine aka rabbit hole should I go? 174k on it now.