Electronic ignition upgrade / voltage regulator question

I've been using one of these since changing over to electronic ignition on my '66 Cuda.



Found this link for Jegs. http://www.jegs.com/i/Mopar+Performance/312/P3690732/10002/-1

Haven't had any problems running the stock alternator. Don't know why it says for race only, seems to work just fine. Would be nice to have more amps though, will probably go with a later model set-up when I finally get around to rewiring the car