Thanks for the Kudos!
1-heating coil? You are fine, nothing to worry about
2-When you do the BL, I would not worry about the radiator. Made no difference for me or anyone I can think of
3-Well if you get the PB blast, the tube that comes with it gives you a direst shot. Try going from the wheel well. Also, you may want to try standing on the tires and then geting a better angle on it
4- in my case, the 2 rear most bolts WERE too long so I ended up using extra washers. I have done a few BL's on Xterra's and I was the only one that had to add these bolts. My advice, buy them, keep the receipt, return if you do not use. It is better to have them and not need them then to need them and not have them.
Good luck buddy, call me if you need help!-James
719-640-3790