LS1/LS6 Flywheel Bolt Kit, 11mm, Part #: 330-2802
They go for around $27.
That's a nice picture. Too bad we're no longer doing the COTM calendar contest
Those cross member are made to mount the th350 or th400 transmissions. Unless your car has had one of those installed you don't need it.
What transmission do you have in your car? If it's the 4L60E, I'd think you'd want a torque-arm relocation crossmember. The other ones on their site
As a fellow convertible owner, I'm gonna vote for the SFCs first. I can say that SFCs and Strano's sway each made a big difference when I installed them