What are you hoping to see? Porting job? Valve guides?
OK understood. Many guys back in my day were hogging out ports , making them smoother that a pigs belly which in many cases in the wrong port, hurts.
Not to mention the fact that us older guys never had access to a flow bench much less heard of them. Some of us made port model templates that we found from some Jenkins or Yunick gru. If the template matches , that's what we did, match the contour but we were relying on someone else advice. We did not take in account going to the lightest valve with the largest port seat.
If the die grinder bounced, we had to replace valve seats. The intake sides were always prone to hitting a water jacket.
So unless someone is doing you a favor, I guess you should accept it but otherwise flow bench data sheet is more accurate.
My guess that you have stock heads? I can only guess the best I have seen is intake ports flow about 140/170 at 28" mercury. That's all I know about that.
I saved my self a few buck and lots of effort, I went for a CNC set of AFR 195's. Yep their expensive but you probably get your $$ worth on a set of the newer after market heads.
Really, I am not going to see all that airflow I paid for just cruising to the sonic.
If you don't trust your mechanic, who you gonna trust?