EDIT: Before you start reading through this discussion thread, you may want to check out the COMPLETE ARTICLE on this modification here:
240sx Convertible Door Pillar Modification - Complete Article With Pictures
Then, if you have questions or comments, you can come back to this thread. Thanks all!
p.s. Keep in mind, this article was completed in 2004. I've slept a few times since then, so I may not remember everything I did (thank goodness for the article and pics, right?)
Well, here goes. Here's the first set of pics of this project.
Pic of the trunk, I'm building a false wall to mount the amps on, the Bazooka is stuffed in the back. Note the CD changer relocated to the left to make room for amps.
Interior all stripped out, waiting for new goodies....
More "nekkid" interior.
The "operating room"...
Floor insulation installed - Dynamat, plus a layer of foil-backed "bubble wrap" for heat rejection.
New molded carpet - SWEET!
New wiring for the audio!!!
OK, here's where we get to the good parts. We'll be using the REAR seatbelts for this project. Unbolt the rear seat belt retactors (make sure you have your keys, you'll want to run the top up to get to the back bolt. The seatbelts are easy to remove. Here's a pic of the seatbelt retractor, close to its new home.
Place the seatbelt retractor mechanism in the lowermost hole in the panel behind the door, FACING INWARD (opposite of how it looked in its stock location. It should fit, you MAY have to whack the side of the opening with a hammer to "persuade" the hole to grow a tiny bit.
NOT PICTURED: Use the BOTTOM mounting tab, and drill a hole into the underlying metal, and run a bolt in there. This will keep the seatbelt mechanism square and solid.
Also (not pictured), for the TOP mounting tab, you obviously can't put a bolt through there, as the seatbelt runs between the tab and the body. Therefore, I took a piece of metal strip, placed a bolt through the top mounting hole and screwed it into the body metal on either side (this will brace the TOP of the seatbelt retractor while allowing space for the belt to retract and spool out.
You'll be using the FACTORY seatbelt mounting hole (from the coupe) which is also seen in this pic.
Drill a hole (as shown) near the topmost hole in the panel, and mount your seatbelt loop there. Make sure the mounting tab is INSIDE the metal panel. This is ALSO a rear seatbelt part. Waste not, want not.
Here's the seatbelt loop properly installed (properly if you're ghetto-rigging new seatbelts for a convertible).
Next, cut a slot in your rear side panel (somewhat of a slight angle) as shown here. A dremel with a reinforced cutoff wheel works great.
BEFORE you cut the slot, you'll need to lop off the big chunk of plastic on the back. A hacksaw blade (held by hand) works great here, as you can lay it flush and cut it off smooth.
There's a great little seatbelt grommet in the FRONT door panels (at the bottom). Remove this (waste not, want not!) and use it in the rear panel as shown. It helps if you grind down the little nubs on the back side, as the rear panels are not as flexible as the fronts).
Infinity Reference seperates and crossovers are a nice fit behind these panels (while we're at it).
Here's how it looks (roughly fitted, not finished).
More pics to come!