Originally Posted by 99offroadrngr
If he used the same needle that came with his new cluster he can still use the battery test on the old cluster and match it to new one
Sorry, I wasn't too clear in that.
He said he got a new gauge cluster and did the odometer swap, in which the speedo needle is removed in the process. Because he didn't perform the test on the new cluster prior to removing the speedo needle, there is no way to properly retest using this method because the original needle position was not recorded. He could have put the needle back on at 0 MPH, but having it exactly correct is very hard now.
The easiest way is for him "as he stated" is to put the needle back on while driving using his Scan gauge as a speed check.
Sorry about the clarity.