what are you planning to do with the non racing one?
A "new" stock hg & headbolts last fine up to 300 odd whp and the only reason this particular engine blew it's hg was from the detonation. So as long as it's bolted down to 72 for stockie or 80-85 for arp (as said, it'll be written somewhere in the instructions) The engines are all good.
Oh yea, as said above, make sure you get the block & head smoothed to the correct RA
I managed to get mine down to 17 RA which is really quite good so i won't have sealing issues
