Alternator/Starter 440 Swap?

I'm swapping the slant 6 to a 440 in a 69 Barracuda. Got most of the parts lined up. Does anyone know if I need to switch out the starter and alternator? I'm using schumacher headers so starter size shouldn't be an issue. If I do need to change then what do I need to look for? Amps, size etc? Thanks.