distributor recurving

I have a new engine I have dropped into my 66 Dart. It's a 408. The distributor is a new never used procomp. What are the things that tell me if I need to change the curve or is it something that I need to start engine and do some tuning first. Also I would like to start the engine before my dash and wiring is back in so what temporary wiring would I need to make for this to happen? If additional info is needed let me know. Right now the there is no wiring in engine compartment. I am hoping I can do this without alt on as well. Cam is a roller so long breakin run time isn't needed. My reason is to check because engine builder is retiring and I want to make sure there are no obvious issues with this build.
Thanks , Rod