Engine Dyno Questions!

Hey all,
My 1973 340 engine is about ready to go to the dyno. The problem is, the guy I am taking it to is local and says he is not sure how to set up the ignition due to there being the ECM and ballast resistor. I want to run it with the distributor that is going in the car. So, how can I do that? Is there a way to set up the ignition on the engine stand to run without the ECM, ballast resistor, etc? Can I not just supply 12 volts to the coil? I am a bit upset that I have to figure this out. I would think a guy that has been doing engine runs for the last few years would know more. However, he states he has not run a Mopar with electronic ignition and wants to make sure it is set up correctly. I will be the first. Any help would be great. Thanks.