Anyway, I haven't found any sources on the 8 302 figure. But going by Ethon, which five 302s flew out of one hanger pod, then at that point would be 10 (or more, there could have been more, but lack of pilots, or those weren't ready or they were on standby).
Problem is that visuals is what we got for the size of the ship. We did get a line from Carter saying that an Al'kesh is a tenth the size of the Prometheus. She had to mean length, because a tenth in mass is 2.15^3. The cube rule which means the Prometheus is only a little over twice the length of an Al'kesh. She of course was generalizing, though.