Yea, any holes in there to vent the enclosure if you're intent on using the fan.
I really don't think it's necessary, as you really never will abuse the duty factor with normal usage I use the same radio, mounted in the same configuration you have there.
Just remember to remove the cover before punching holes in it.
I am thinking that fan is a little much, and I hope you've taken steps to keep wires out of it as that will ruin the fan rather quickly.
The proper crimper actually rolls those tabs into the conductor and insulation. I use a Greenlee hand crimper and dies, but there are a few cheaper ways to do these, as a Greenlee 8 or 9" frame and a couple sets of dies will put you a little over $150, and for someone that does very little electrical or isn't a serious hobbyist it's a little excessive.
I have used this one:
http://www.itcelectronics.com/product_info.php?cPath=1177_1257&products_id=9981 And it's a VERY good crimper, Get a insulated and non insulated die and you can crimp anything you should run into
Or the ratchet crimper on this page should do a good job.
http://www.action-electronics.com/molex.htm I just don't trust a regular compression crimper. The dies used for a closed end vs. an open end connector are vastly different. and they almost always never actually use all of the available crimping surface.
I still solder the critical ones, as they are quite important to have done correctly. And remember, Crimp, then solder.
(And heatshrink if so inclined.)
Ok, my concerns with what you have done there. You have broken one cardinal rule, You have not fused your power wires within 8" of the battery... What most people think are that fuses protect the device. This is incorrect. Fuses protect the conductors from the device and overcurrent due to shorts.
If the device fails and causes a short, the fuse will fail where you have it, but if you somehow chafe a wire between the fuse and battery, you have no way to interrupt the current and this could cause a fire as you're unprotected between your dash and the battery (which can create 300A in very short order that is very sufficient to make smoke).
The plumbers tape was a good idea, the 2000-01 brackets are different, and I just drilled holes in the factory brackets for my install
Another cool thing to do with that radio is add a roger beep. It's really easy. Mine is actually a Morse Code "K" You can pick these up from any CB shop, They will even put them in for ya.
And make sure you tune that antenna!