Correct rad if yours is automatic..
http://www.mymopar.com/radiatorspecs.htm
I can only guess because the one you are looking at was printed in March '69.. superceding April '68. My parts book is April's superceding Dec '67's. Maybe they had stopped making -045 radiators by the time they printed your parts manual!?
I can only assume the -045 is correct, since we have another member looking for one for his '68 Charger in the WTB !