Without consulting any books, that was what I though Toomey ran at Mexico City. Were there are other real fast 400 m types as top decathletes in the 1960s? And 45.4 (45.6) is really moving along in the 400 m.
Another fraudulent Mexico City mark getting blown out of proportion. Doesn't it strike you as even remotely odd that there were more never-to-be-matched again marks at Mexico City than all other Olympics combined. Is the concept of high altitude-aid lost on you?
Note that Toomey is in the world record books twice, and in those two decathlons (one before Mexico, one after) he ran 47.1 and 47.3. He was a decent quartermiler, but not a world class one, no matter what the MC time seems to tell you.