A second question is how many conference games will you play? It begs the question as to whether or not it's possible to reduce the normal schedule by two games, then have a 4 team "cross over" playoff?
Example: #1 East plays #2 West, and #1 West plays #2 East, then the winners play off for the conference championship. At all levels below that, the correlating teams below the top 2? As an example of this, cross over 3 & 4, 5 & 6, and 7 & 8. Last game winner paired, and losers paired.
It's not as complicated as it sounds, and it could mean for some interesting football.