the mini starter will work fine in there with headers, but the headers have to go on after the engine's set generally in place and the starter should go in before the engine's even hoisted off the ground. That means between the stand and the car, bolt the transmission on and the starter.

The headers go in from the bottom (make sure the oil filter's off, pass. side won't fit with it on there). The problem is, the starter may not come OUT that easily. The good thing about Hooker Comps is that the Summit kit bolts right to them.