Battery and alternator replacement

I do not have the original manual or the original battery and I think it's caused me to replace the alternator and battery more than one time based on the information from the local auto parts store does anybody know the specific battery requirements it does not indicate it in the manual and I do not have the original battery

Greetings, I normally purchases Duralast Gold for my 95 Riviera. And have had great success.

The battery should be Group Size 79, the alternator you can search on rockauto for part numbers and brands.