Hey Scott, sorry it took so long to get some info here, just got my book back from a friend. Here goes:
C4AE= 64/65 352-390- 71-74cc 2.02/1.55 valves
C5TE= book doesnt list this number under FE
C6AE= 66/67 there are alot of different heads, what is the other letter, A,AA,K,D,R,J,RVL,AB,L,etc.
C8AE= 68 67-70cc 2/02/1.55 valves
Let me know the other number and I can let you know. Hope this helped.