did it call for 10-12 thou cold ??? Give a call to that cam company and confirm that.. That might be a cold lash setting also.
I cant recall a solid roller cam ever being that tight on lash.. even tight lash cams are in the .018-.020 range.
If that was all aluminum wedge (Maxx Block) and Indy heads, you couldnt even achieve that those settings, if you wanted to. That tight of lash set hot would leave the valves open once it cooled... fact.... They grow about .015.. so it wouldnt even start once it cooled down.
I dont care what the cam card calls for I wouldnt run the tighter than .018-.020