Voltage Regulator

I have a 87 dakota, that I put a 2000 dodge ram 5.9 engine in.
The trucks voltage regulator had been replaced several years ago, with a Standard VR125.
I am not for sure which alternator I have. Looking online at rockauto, they show 117 or 136 amp. Cant find any numbers on the one I have.....
I am reading 14.96 volts when running (900 rpms)
I think this should be more like 13.7-14.3. volt range
Should I replace it with a different style or model number?
I didnt think it would be a problem, but wanted to ask