The best question asked in this thread is this, worded two different ways.
What's your budget and intended use for the car?
How fast do you want to go for how long?
Answer this and it’s much easier to guide you. Do you wanna go faster? Swap something better and get prepared to spend. Want it the same stock reliability? Rebuild or swap in a less used stock engine, it’s a bit of a gamble either way but more likely to provide the same experience you’re used to.
I’m curious, at 250k, how is the rest of the drivetrain as well as the body holding up?