[Jeff Lee]

I always do. It tells you if the engine is going to hold together and gives you some numbers to work wit without guessing (like stall speed, launch / shift RPM's, gearing in trans and rear, etc). My advice is to get a flat rate to include set-up and full series of runs, whatever is required, to find optimum adjustments (timing, fuel system, lash). Additional charges would be anything above and beyond such as changing parts (cam, intake, etc.).
In the end it's a lot less than hashing it out on the drag strip, especially if you are primarily racing at NHRA events.