recently purchased a 88 gt stock 5.0 with 128,000 for a project, they had enough fix a leak in the radiator to stop Niagara falls, flushed it out , changed water pump, timing chain, timing cover gasket and a new overflow tank, still losing antifreeze found out blown head gasket! now my question what are some of my options , can the heads be upgraded on a high mileage block? should I save for a new block or rebuilt one? or the option we were looking to since the engine does run strong ( barring it doesn't go bad in a year), change the head gaskets, cobra manifold, bbk throttle body, New 1.72 rocker arms, fuel pressure regulator, and a cold air intake, I'm just afraid in a year the block will go bad and I wasted money changing the head gaskets, my mechanic and me picked this stuff out cause it could be used if I decide on a new engine