i have been searching and have not been able to figure out what numbers indicate a turbo head or an N/A head. reason i state this is because i am wondering if it is possible to put an N/A head from an early (81-85) b series motor onto an early (84 to be specific) block, and then re-install everything back to normal with the only thing different being the cyl. head. i have an 84 244 tic i would like to do this on and would first like to see if possible or if its not worth the time. i have not been able to find a late 83-85 turbo head here locally but the are N/A's a plenty.also planning to put the IPD turbo or a K cam onto the head. i just want this to be a decent daily after performing this task.