Header change and question for the Pro's
 

I'm half way thru changing my stock exhaust manifolds for a set of JBA headers on my 89 Blazer. I'm not going to get it done in time for work on Monday. Question is can you run the stock exhaust maniford on one side and the new header on the other for a short time? The 02 sensor is in the drivers side which is the side I have almost done. I wouldn't be driving far, maybe 3-4 miles. Whats your thoughts.