Race only Voltage Regulator???

It was recommended to me that I replace the original Voltage Regulator on my 1970 Challenger with a Constant Output Voltage Regulator.

All the ones that I have found on the net say "For race applications only"

My car has a 'beefed up' 360 in it but I do not use this car for racing at all.
I have the MSD-6A  electronic ignition

The concept of a regulator that provides a constant 13.5 Volts makes perfect sense to me BUT why do all these say they are for race applications?Why do they say that?  Will it hurt my engine if I use it without some other ignition part I am not aware of?

Thanks for any insight  

I used to run the racing reg. on my street/strip car. However I did not run it with MSD. I do know you are supposed to run your MSD with a min. of 12v and a max of 18v so I would see no harm in using the racing reg.
Doc  

if your 1970 runs fine why replace anything? the constant output could maybe overcharge the battery. I am running the moparperf constant output unit for decades in my 1970 with a mopar chrome box and now an accel 300 box with no problemo.  

I have that classic case of the lights getting brigther when you rev the engine so that is why it was suggested that I get a regulator that puts out a constant 13.5 V

I was all set to buy it but every site I see it on says 'for race only'

There has to be a logical reason why they would put that on because if they left it off, they obviously would sell more of them.

So what is the scoop?

Thanks  

Car electrical systems defy logic
After all, the Chrsyler Engineers in 1970 came up with 5 volt Gauges to be used in a 12 volt automotive system. Have you seen what they had to do in 1970 (pre Integrated circuit  era) to get them to work? While their solution was clever, going from 12v to 5v was still a cludgy design. To make matters worse, if that cludgy part ever failed(which it did a lot), It fried the gauges! I just went through this with a solid state voltage limiter replacement on my Instrument panel.


Is the accel 300 basically the same thing as the MSD 6A ?

How could a contant voltage (13.5) overcharge the battery?

Not arguing with you - just trying to understand what you mean.

Thanks  

A constant 13.5 will not over charge a battery, in fact the max output is 15.5 just like a reg. voltage reg.
My 67 Plymouth had the same problem with the dimming lights at idle due to a radical idle.
The high output electronic reg. solved the problem.
Doc  

Thanks - that settles it. I just ordered the regulator.  

I bought one of the silver versions of these from Mopar and it stranded me several times burning up my stock Napa/Autozone/Advance auto COILS.  

If you are burning up coils I have to ask do you have a ballast resistor installed?
Doc