Msd 7al-2

Is a MSD 7AL-2 a streetable/highway driven ignition box or is a 6A better. I might do a little racing but it will mainly be a street car.
Thanks
I run the MSD 6A in my 73 Dart Sport 340,4 speed.It see,s the track alot also alot of street.I like the fact you can swap out the rpm pills for limiting rpm(mis-shift)it,s saved my motor a couple times!OOPS!Don,t know anything about the 7-al2,does it have double rev-limiters?