Blockbuster,
I bought the set from Prefix and they gave me an install manual and paper template's (templates are long gone). Here's some info from the manual that should help;
- "Upper rearward edge of the dive plane to facia corner is appprox. 11 1/8"
- "Verify front edge of the dive plane is parallel to facia feature line"
- "Drill out 3 holes using 5/16 drill bit"
- Place "O" ring onto rivet, washer to rear and proceed to rivet in place"
You know how it should look, so just make sure the botton is parallell to the "rise" on the facia and that the back edge is 11 1/8" from the top of the facia.
Also, we used nylocks vs. rivets, those rivets can/will come loose.
Good luck, Mike