what speakers comfortably fit? Fiero speaker Q's
 

eh guys back again with a couple of questions.
first, does anybody know what the site is that can tell me how big a cut i can make and what size of speakers i can actually fit in y door panel,
second does anybody know what size of speakers are in a 86 pontiac fiero,
and third about what size of speaker could i make fit into the same fiero.
any answers are appreciated thanks