Ok. So I need help trying to figure out what subs I can put in my 1974 Ford F100. I think that I can put a FTS240 12" case to house the subs, but I want to know if that would fit and if I have to put shallow mounted subs in the case or if I could put bigger subs in there. I want to get a nice sound system in the truck. The FTS240 has a 1.21 air volume pet sub but I want to know this kind of stuff before I buy the subs and the case. Also if you could recommend a good amp and good speakers that could be put in the doors. Thank you for helping me.