Confusing Day at the dyno...Need some qualified opinions

I've visited this site for years for info, but this is actually my first post. Due to some driveability issues since adding the cam I decided to have my car dyno tuned and to get a custom chip. The gentlemen that did the tuning has been doing this for over 25 years and has done numerous 5 liters over the years. My question is over a little disappointed and confusion with the results of the dyno runs (mustang dyno by the way) My combination bested about 240hp @ 5,300 and 245tq @ 4,000. I'm not all that concerned about peak horsepower as this is a road course car and definitely not a drag car. I've been very careful to try to match parts to maintain the majority of the low & mid while gaining some up top. Do these numbers strike you as unusual for my combo? I thought I would have produced a better peak horsepower, but I was really shocked that my torque was kind of weak. I wish I had the charts electronically to share, but I just have hard copies. The tuner was very happy with my air/fuel ratio and the broad power band that the car did have. Another point of reference for his dyno is that most of his blower (9lb kits) 5 liter cars net 320-340 rwhp. Figuring a blower add on my car, I may not be that far off on his scale anyway.

I know trying to determine which dyno is best or who is the best dyno tech is an argument that will never be settled. I thought that looking at the hp and tq relative to one another (regardless of the actual numbers) that the peak tq was a little low. Any thoughts would be appreciated, from reading posts in the past I know that some of you know a hell of a lot more than me. Thanks!

Thanks for the quick response guys. DMAN, you will have to excuse my ingorance on the A/F mixture throughout, but I'm going to give it a shot. On my charts my fuel line is red and the only metric in red is Lambda. I honestly haven't a clue in hell what Lambda means or if it is even relevant to the A/F, but it starts off around .95 @ 2,800 and is about .86 @ 5,500. You are correct that it was on a mustang dyno. As fas as the BBK CAI, is there a better way to feed air without the turbulance potential?

Thanks guys all the way around for the help.

The fact that my A/F ratio is probably ok, I have to believe that the car is probably running ok too. It is hard not to get caught up in the numbers when in reality the only mean something against another car on the same dyno with the same tech. DMAN (if you are still around), where is your torque and horsepower peaking? I'm hoping that our curves are similar even though my numbers are reading much lower. I wish that I could share my charts, but I only have hard copies and I do not own a scanner.

I have probably overlooked this too much, but when fitting a flaming river steering shaft I had to ding one of my header runners. Not a life changer, but the more I think about it I'm probably losing 3-5% here at full go too. Anyway thanks again!