Hey guys I'm doing some work on my 68 barracuda. It's a 383 S matching #. I have upgraded to MP electronic ignition and cracked back's headlight relay kit (that I still have to install) I want to leave the original amp meter (good idea ?) I bought a sunpro volt meter that I was going to convert and install in place of the amp meter in cluster but changed my mind. Any way my question is.. Is there a way to test my current alternator to confirm the amp rating? Can a alternator repair shop spin it up? I want to leave the car as close to original as possible but want it to be safe.. The car has original radio. Thanks for any advice.