I just removed the deck lid torsion springs when I installed the intercooler. Prior to the intercooler install, the deck lid pivot cleared the supercharger snout.
There is a lot of pressure on these torsion rods so exercise extreme caution when removing them. You can crack the back window and easily break a finger if you are not careful.
Here is my method. I use a 1 ton cable puller and a ratcheting lashing cargo strap. I attach the strap to the bottom of the torsion springs under the deck lid hinge. The strap gets attached to the cable puller. The other end of the cable puller gets attached to a tree or to the back of a truck or anyplace that it is secure but above the trunk. I then just crank the cable puller so that the rods pull back from the torsion pins and pull/push them out. I then put the cable puller in reverse and click it until all pressure is released. Next you use a security torx socket to get the pivot bolt off. The rods come out easily at this point.
As for the dogbone; a custom mount is usually required. Don't count on the stock 3800 bracket lining up. Most often they don't.
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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, ZZP Intercooler, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "