Does some noes how hard to change a heater core on a 1997f150?
hard is only that one has to lay in odd way to get to screws and like other one said couple hours work to remove everything only tip i can give is grease the hoses really well and dont twist on them to much when push back on an dreplace the hoses while you got it all a part might fine
repair manual type this dont think you will need it not much more than removing a lot of screws really thats the hard part you have to lay side ways or upside down to do it
repair manual 1997 ford f150 PDF