587 heads

Agree with PRH about the seats I'd use the Dura Bond good sintered seats
Not knowing anything about what you want to do with these heads...
I'll post an "if it were me" anyway"
If street and a half inch or less lift cam and not a bunch of overlap
I'd take those too big 2.02 valves and put a 30 degree face on them and them fit them to the current top cut then reduce their od to give a good margin, maybe even a radius
then while cutting the new seats I'd do a pro valve job and open the throats then blend the bottom cut
Agree with PRH about the seats I'd use the Dura Bond good sintered seats
Not knowing anything about what you want to do with these heads...
I'll post an "if it were me" anyway"
If street and a half inch or less lift cam and not a bunch of overlap
I'd take those too big 2.02 valves and put a 30 degree face on them and them fit them to the current top cut then reduce their od to give a good margin, maybe even a radius
then while cutting the new seats I'd do a pro valve job and open the throats then blend the bottom cut