Been there, done that, got the T-shirt. Elected to rebuild the entire engine with a .020 overbore. Expect to drop $1K for machine work and parts - with you doing the dis-assembly & assembly. Mine had 250K on the engine. If yours is significantly less miles, then you might get by with new head gaskets, but at least get the cylinder heads a new valve job and have the head surfaces milled flat. Gonna be tough to do all that work with the engine in the car, but maybe you're younger than me and more able to get around.