Pete,
7.5A for the VHF (can get away with a 10, most VHFs pull around 7 when transmitting), 5A for the stereo power (red wire), 10A for the stereo memory (yellow wire).
Remember, if you don't want to lose your station pre-sets or the clock, yellow has to be constant hot. But these days, with ipods and cel phones, a lot of people say F it. But fuse each separately, even to switched hot.
