It's been over a month since I last posted but I have been getting some time in the shop, all of it spent working on this F'ing trunk lid, so here's where I am...
Knowing the lid was so skewed I decided to pull my original steel lid apart, removing the inner support and using it as a template, but not even that was without trouble...the trailing edge of the support was rotted (one of the reasons I chose not to use the factory lid in the first place) and I had to spend a day fabbing up new metal.
The old skin, which I'll now use as filler material if I need it.
Here's the inner support, placed on top of the glass lid, after I've fabbed in the new metal:
Once I got those shinanigans finished up I used Cleco's to secure the frame to the lid solidly, which would allow me to mount it on the car, so drill, cleco, drill, cleco, repeat...
So about this time it's becoming really apparent the lid skin has a twist to it as well as being skewed (am I surprised?), so when I placed the lid on the car the fitment was, well, for ****.
Oh yea, I want the rear corner of my trunk lid raised 1/4" past the body line!
Aside from the the skew and the warp I still had some sizing issues in terms of gross size (including thickness), hell, just about every conceivable issue, so I took a different approach, which actually worked: I took the skin off the frame, mounted the frame back on the car, drilled the hinges/frame mount so I could use a 1/8" drill bit to re-align them, then cut the frame in half (from side to side). I did this so I could more easily manipulate the frame and lid as individual pieces, pulling out the warp as I went while still having perfect alignment based on having previously aligning the frame without the lid.
I know, it seems like a strange process, and I have to agree, but it actually worked! Above, you can see the pie cuts I made in the frame to help align it, which seems counter-intuitive, but like I said, it actually worked (I'll get pix of it mounted later, I ran out of time).
Once I had the lid and frame working together as a single, good piece, I took the frame off and started the rust prevention steps as well as removing a bunch of steel to help take some of the weight out of it. Once the weather warms up a bit (been in the low 50's here in Vegas) I'll bond the skin to the frame then finish off the glass work so it fits the opening like a glove.
Here's the frame after removing some steel to lighten it: