At the "lower levels"....7th and 8th grade, Blackhawk Christian has already been fielding 11-man teams. So there is a template in the ensuing years for them to participate beyond 8-man.
(I believe) They played their 8-man schedule at Snider's Bowser Field, so I'd assume that at some point they would be looking for a larger facility for their "home-field".
RUMOR ALERT! With Snider potentially building an on-campus stadium soon across the street (next to Lane Middle School).....Might that be the place when the Panthers are on the road? Don't forget that the FW Fire Station is moving to Reed and State. A heck of a lot of LAND that is owned and ready for 'something' to build upon...just saying!
Yes, the ACAC may be the most appropriate conference for them in sports....they'll take their lumps in FB though. The ACAC schools (no matter what we may assume) are steeped in FB tradition that will take a few seasons to become competitive in. Baseball, Basketball, Soccer...etc. the Braves would be a competitive member on Day One, and in some cases a POWERHOUSE.
Good luck to them if this is their goal.
And yes, 1A FB! The student numbers would place them squarely in 1A for FB. All other sports, would remain the same as they are at this time, unless SF puts them into a different classification.