As for the block heater, do you know if this was installed when the car was built or was it installed later. This may affect where it was routed. You can determine this by looking at the sticker on the cover over your spare tire. If it was factory installed, you'll see the code K05. I will take a picture of my car later and indicate where mine was coiled up by GM. Originally, it was in a clip attached to the engine (slightly forward and right of the sight shield - if you're standing in front of the car looking at the engine).
StingRay Bike w/cards in the spokes, Weeeeeee!