347 Build IN PROGRESS!!! Pics inside

I'm gonna try to get the engine back in the car this week and get her started next week. Got a couple questions:

1. Do you guys think I should stick with my overdrive pullies for starters or do the initial tune with the stock pullies.

2. Should I bolt in the headers on the stand or wait untill the engine is in the car but still on the hoist? A guy told me that its better the second way so I don't ding anything up...