Ok I did some research and I have narrowed it down to these part numbers:

FAN:
9798940 or 542621 4 blade 19 inch exc ac HD, or A.I.R. (which I have)!
480033 or 9779005 all 8 cyl with HD (what does HD stand for) exc ac 5 blade 19 inch
N.L.A. or 3999012 7 blade 19 1.2 inch

FAN CLUTCH:
477957 or 9786404 All 8 cyl exc ac

FAN SPACER (I have both):
3927794 All 8 cyl exc ac 1 1/2 inch long
535253 All 8 cyl exc ac 2 1 /2 inch long

I have a 67 Firebird 400 no ac, but a CA model with A.I.R.

With this info, what fan, clutch, and spacer should I be using?