Good luck. How about some details of what you got cooking there?
I'd tell you to not get your hopes up and if you haven't put a safe street tune on it, then do yourself a favor and hold off on the dyno visit until it runs and drives on the street. I've made the mistake of being disappointed by an initial dyno visit. Even a tried and true combo will not put out what you think unless you really get lucky or have dotted every 'i' and crossed every 't'.
My experience has been that I've found every issue on the dyno, which isn't a bad thing, but it's an expectation killer - lol. The 1st time I hit the dyno with a turbo motor I thought I'd make 500whp and ended up just under 400 due to my mismatch of parts - too small of a turbo on a small motor. And I have to admit that I haven't had our newest setup to the dyno yet, but I now what it'll do up against cars that have dyno'd in the 700-900 whp range. I've become comfortable with not knowing what the number is lol. And not letting anyone else know what the number as well.
With that said, I understand wanting to know. I'm sure you've heard of 'creeping up on the tune' with boost. It takes time to creep up and check logs and plugs and everything else - good luck. But I am interested in the build, your turbo looks small, but cameras, angles and parallax do that sometimes. I had someone look at our S480 in a pic and tell me they thought it looked like a 76mm T4.