I'm glad you brought this up...
For great guidance on conversion to alternators and other
extremely useful info for our old cars...go here!
Download the tutorial stuff, too.
http://www.madelectrical.com/index.shtml
I converted my 76 Rolls Royce from its broken $1500 alternator
with external $250 voltage regulator to a $69 Chevy internally regulated alternator (liftetime warranty!) from NAPA; with the help of this guy!
My friend converted his old Nova that had a generator to an internally
regulated alternator using MAD's kit.
Bracketry is easily done using the old mounting points and playing around with spacers or washers. Hope this helps! Mike "RoadMaster75"