Hey guys, I did this last year and did the grill block at the same time. I used wood screws at 4 places to hold mine on. The grill block was made by trimming a piece of plastic that used to be located on the inside of thwe rear hatch and it too is held on with wood screws. I have not been able to test the FE benefits yet but the top speed with these mods went from 81 up to a nice 87 mph! The main benefit is a LOT less buffeting on the hiway, almost likie I am drafting. Here are a couple of pics:
Even the 3 cylinder Geo gets action
UMTR Nationals at Edgewater - 9/26/09 - Hyper-Performance Motorsports Inc. Photography
The White Gnat strikes again
UMTR Nationals at Edgewater - 9/26/09 - Hyper-Performance Motorsports Inc. Photography