73 Javelin won't charge until I blip the throttle

I found this place called Karam  http://alternatorstarter.com/ 

If you don't have a functioning A/C optioned car just use the blue w/ the white tracer shown in the wiring diagram I posted. It's faster, and a lot neater as the wire plugs in with a bullet connector and is coming from the fire wall as opposed to the front on the engine. I've never had an issue with it being 12v as all of the current electric chokes operate on 12v, as a matter of fact I question if a current production choke would operate correctly on a 7v supply.

I talked to one of the owner's at Karam and I asked him if the motorolla alternator they sell for my car has the 7v ac terminal.  He said  "it has it"

So did you get the alternator to work properly yet by getting excitation voltage to the orange-reg terminal like on the picture that Billd posted? I can't see anything changing there with a new alternator until that gets sorted out. 

re: the "rev up to start charging" issue --

i had this happen to me, on a GM type alt i installed on a 258ci Hornet; a so-called "one wire" alt that's really three wires (output, battery-sense, idiot light).

here's the thing: alternators need a bit of battery current to generate the small initial magnetic field needed to start the charging process. that current often provided by... the dash light!!! (see caveat below). i found out the hard way, by replacing the old #1853 or whatever it was with a modern LED replacement. it wouldn't charge til i revved it over 2000 rpm! onec i did it was fine.

so if you're still having this problem, try installing the correct lamp/bulb. it's easy, and worst-case you'll be out a buck for a lamp. or look up lamp current ratings, and find one that draws more current. no harm can be done here.

CAVEAT: some 1960's early alt cars relied 100% on the lamp to start the alternetor up. on those cars, with a burned lamp, NO CHARGING! and no lamp to tell you... so unless you noticed that on initial turon on the lamp was out (easy enough to overlook), you would end up with a dead battery and no good symptoms to diagnose! later cars added a resistor in parallel with the lamp somewhere in the harness so that you at least got late (rev-up) charging. beats no charge, eh? :-)