first off the heads bolt holes will need to be enlarged to 1/2 inch and you can use the front timing chain cover but other than that nothing. the 351w where 28oz while the 5.0 is 50oz hope this helps
your clutch will work, all 351's are 28ooz imbalance..most likely your 5.0 headers wont work, almost guaranteed.. you need the 351w-fox swap oil pan, dipstick/tube, and pickup tube along with swap headers. 351w distributor, intake, etc.. stock motor mounts will work, good luck and PM me if you have any specific questions, i've been through it all..