You most likely will not find much support in the ceiling areas. Most ceiling consist of thin 1/4 -inch or less ceiling board without any studs to tie to...
You may have to mount a flat back board first and secure them to the ceiling area using MOLY BOLTS to spread out the weight distribution.
It can be done if you can find support from the thin ceiling.
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS