front main are 5.1/4 with a baffle rear are 4 by 6 with a baffle front baffle found on eBay . you can make the front work with a 6 1/2 but you must drill it in glue it,exc..
In most states they can be if there isn't a passanger side air bag or if you can shut the airbag off. they do need to be rear facing though
YES, Direct bolt up.
yellow! i think
Yes, as long as their car seat base is buckled in the correct manner shown in the car seat directions and their facing the right way.