In a mathematical sense, wouldnt the correct answer be... 14 heads? heh.. It took me a second to catch it. (Boy my "heads" spinning on engine stuff lately.. (pun intended)
I guess my question is, are they the same heads, just different applications?...or..production locations?... Most everything Ive read has the 16s or 62s as the main Firebird 400 heads for 68/69. But I seem to recall the 48s were RAIII heads as well..?