Need help with 440 break in

Ok, I have another question. Would it damage my heads in any way if I used the stock exhaust manifold and just snugged down 2 bolts on each manifold rather than tightening them all down? Since its only temporary I'm not really worried about exhaust leaks. I could care less if it damages the manifolds.

Oh ya, I was able to get the intermiediate shaft out and primed the engine.