I have a 87 Cutlass Sup with a 71 Olds 350. I am trying to figure out what headers would work. Thanks for any help.

 

There are about a zillion different sets of headers for your application. I don't know if any of the specific brands are better than others. You should be able to find plenty of choices in a Summit or Jegs catalog.

 

Any headers for a 307 in an 81-88 Cutlass will work fine with the 350.