Dyno Tuning?

I dyno all the time. Havent put the dart up yet as the rear end is still giving me trouble but I've put my 4runner up afew times after a complete rebuild to set a/f and timing, and fuel pressure and to find out why it goes pig rich after 4000rpm (efi is a pain). Just the other day did a 100% street 86 camaro with a completly stock 350 being fed by a single t-70 turbo on pump gas. Made:

9 psi boost
Max HP: 389 hp 4700 rpm
Max TQ: 472 ft/lb 4300 rpm

And

14 psi boost
Max HP: 492 hp 4600 rpm
Max TQ: 563 ft/lb 4500 rpm

Would have never gotten near that power if we didnt put it on the dyno. My point is that is the only way you will know what your car is doing and how the little tweaks help and hurt. I pay about $60 and hour but have heard of up to $125 and hour. You should usually be able to tune out any bugs within an hour and a half or so even if its barely running when you get there.