Why not get the stuff ceramic coated? It is so so so much better than that wrap stuff...
i was under impression that when you wrap it, all it does is keep the heat in, so it will eventually crack the steel or what ever it is you wrap. Also, if you try unwrapping it, it would have basically stuck it self to the metal, so it peels away the steel making it really fragile and weak. I just had my stuff coated, 600 for manifold, dump and exhaust housing. It is so much better.
You have gone to all the effort of doing everything else right, i think you should ceramic coat it while engine is still out Keeps so much more heat out of the engine bay also!