voltage regulator

[cuda hunter]

67 barracuda 400 727 .
Voltage shows 18.  Switched to a different one I had in the garage.  Same voltage 18.

New battery in the rear is puking acid. 

Is the altenator bad or should I try a voltage regulator off of my known runner?

No stores are open out here and I work all day so it's hard to just go pick one up.  And they would have to be shipped in. 

[dodj]

First make sure your grounds are solid and all connections are clean and tight.  Voltage drops across poor connections can fool the vr into overcharging.

[Chryco Psycho]

More likely to be a bad diode in the Alt if 2 regs make no difference

[cuda hunter]

That's what I was thinking at this point.

When the motor blew, the shift point was about 7500 rpm.  Would that be enough to fry the alt? 

[Chryco Psycho]

NO , I ran my Duster to 7200  for years with no issue but the alt could still be bad