Are 586 small block heads any good?

I was at a swap meet a couple of years ago and picked up a brand new set of 586 small block (smog) heads. I was wondering if they were usable for just a warmed over 360 I'm putting in my Dads 39 Plymouth. Its a 360 +040 with Kieth Black flat top pistons and a 441 lift cam and I havnt decided on an intake yet. Other than blocking off the smog ports is there anything else I need to worry about on these.