The internal grill block is attached with sheet metal screws (hex head). The one screw hooked to the sheet metal behind the hood latch had to be cut after I used it to drill the hole. I used the screw to self tap the hole, then took it out and cut it down to about 1/2".
The external block is all rivets.
The rear skirts are attached with an aluminum frame that supports the bottom. The skirt is riveted to that frame. The frame has a hinge on the front side (side closest to the front of the car) and one bolt on the back side. When the bolt is out, it can be swung out for tire changes.
The top of the skirts each have three machine screws. Inside the fender, I mounted bent, drilled, and tapped aluminum angle iron brackets. The screws attach from the front. So, to change a tire, I need to keep a phillips screw driver and a nut driver/adjustable wrench on board. It's not ideal, but it's really simple to get it hinged out.
I copied what this guy did at ecomodder:
http://ecomodder.com/forum/showthrea....html#post2279
Mine is nearly exactly like his... except I used heavy gauge aluminum sheet metal for the panels not ABS plastic. I only did that because I had recently taken apart an old pop-up camper to modify it into an enclosed trailer and that netted me with tons of this sheet metal. That's what my cammback is made of too.
Oh, as for dimensions, I just made a cardboard template. The frame was a "wing it" experience. Guess and check is your friend!
Hope that helped.
B
__________________