Hhow difficult is it to replace heads in ford taurus 3.0 U engine?

Hhow difficult is it to replace heads in ford taurus 3.0 U engine?

Easier to buy a used engine, they are a dime a dozen since almost every AXOD transmission died around 100,000 to 150,000 miles.

Very labor/knowledge intensive. Being a transverse-mounted engine adds even more challenge