I had some unplanned time to dink around and decided to work on the spoiler fit up.
I learned some things that might help some of you out.
1) A heat gun helps form the fiberglss to the mating radiator cover. My left side needed a tiny bit of tweaking.
Go gentle and heat it slowly/evenly with your hands close by checking to not over heat. 120-140 deg. should be all you need. Hold the part to the shape you desire with a little extra bend till it cools (you will have to be patient here). I installed the part, put layout tape on the spoiler and marked arrows on all the places that needed some adjusting, took off the spoiler,got beer, and heated away...
2) Some trimmed edges were not straight so some block sanding is needed.
3) The metal spacers didnt quite fit/fair the edges like I want so I used gasket stock and made a stack up of washers to make a smooth transition
4) I rounded all the edges that matched up with stock parts with a similar radius.
5) Instead of using the paper templates provided I taped the spoiler in place and made a drill start from the existing hole for a location (be aware of the drills angle or you still could be off). Then full I sized the hole on the Radiator cover. I used the aluminum block as a drill guide now. One bolt in first hole, then drill start in the other. I took the block off and full sized the remaining hole.
This made for as very nice fit up.