Actually, Rani, you don't have to use the late alternator regulator. MOST replacement regulators for pre--69 cars are already solid state. You can look on the bottom if you are not sure. If there are NOT two great big resistors on the bottom, it's a solid state regulator
This photo, with resistors, is an original mechanical regulator
http://vintagemoparts.com/img/p/440-1621-large.jpg
The "quality" 69/ earlier replacements are NAPA VR-1001 or Standard (brand) VR-128. You can also use those on the later alternator by simply grounding one field terminal.
You can do this either way, but when I bought my 67, it had an breakerless "kit" with the old mechanical regulator, and seemed to run fine that way.
I have no idea of the quality of that Jeg's kit.
