Rough estimate on the cost to change heater core on 99 lincoln continental?

it will cost around $450 with parts and labor. and the whole dash does not need to be removed. the glove box needs to be removed and you can get to it. the heater core is probly about $70 and u can find out how do do it urself. if not spend $20 and buy a hanes manual or something. save ur money and spend 3 hours and fix it yourself. its pretty easy|||Assuming the complete dash must be removed, $500