I'm wondering what kind of differences you've seen in buying this setup. It says that just the head package on a Z6 will produce 170hp/116tq. I just want to know what you think, and about your experiences. I'm about to pick one up, and then I'm on to building the block. I want it DD-able, but looking for 200+whp. LMK what you think, pics, info, input, etc.. Thx fellas.