A friend told me about a web site that offered 8 volt alternators. I waited for almost 2 years before going for it and then found the same alternator on ebay with free shipping. DB electric had the mounting parts for about $30, just needed the alternor to mount bolt and a 1/2" shim.
Wiring was simple. Take everything off the voltage regulator and put the NEG alt wire to your ammeter. Almost done. Just run your ignition (coil) wire to the same start switch post. I put my generator and voltage regulator in a box and shelved them. Also once the engine excites the alternator it will keep charging even at idle