Looking back at the installation, I would have to say that it was actually easier than I had anticipated. The problems that we did encounter were more due to reproduction panels and components than the Lateral Dynamics 3-link.
The hardest part of the installation are the front and rear crossmembers and they are really no harder than installing subframe connectors. It took us an easy day to get them in; the installation is more time consuming than difficult. The front crossmember is fit relative to guide holes in the factory frame and is a gradual process that is ultimately cut, fit, cut, fit, and so on until it is in position. No special tools were required and it can easily be done with or without a lift (we did use a lift but that was more about making it easier for us than being neccessary). The only place that we encountered any 'difficulties' with the front was due to the repro floor - the rear third of the tunnel is actually 1/2" - 3/4" shorter than a stock tunnel which made some additional work making the floor transition into the crossmember. Also, the repro floor has additional bracing for convertibles which we had to remove for convenience if nothing else.
The rear cross member is installed relative to the rear axle centerline - which we placed to be precisely centered within the wheelwell. The cut into the trunk is very simple and although the installation is actually easier than the front we took a lot of time measuring and remeasuring to ensure that it was placed correctly - both front to back and side to side. We did encounter some difficulties with the rear cross member installation but that was due to the reproduction frame rails which seemed to just a touch different than the stock ones. Not enough to be really noticable until you have to fit a precision piece of steel that has no give.
Once the time came to install the actual 3-link and rear end it was exceptionally straight forward. We took almost as much time screwing around with the different adjustment points after it was in than we did putting it in place. I am amazed at the range of adjustability (compared to the ladder bar and four link setups I have used in the past) and the simplicity once you can see how the different points interact.
The best part of the installation was Mark and Matt themselves. Even though we were thousands of miles apart, both of them made themselves available by phone and 'net throughout the installation and were extremely helpful with even the simplest questions. I can not remember the last time that a vendor was this accessible and helpful - regardless of time or day. My hat is off to Lateral Dynamics - its a great product and the team there is genuinly enthusiastic about cars and their product.
Ultimately, in my opinion, if you are comfortable enough with your building and fabrication skills to be considering a project of this kind, you are probably going to be capable of doing the installation.
A couple of pictures of the crossmember installation with the sheetmetal cleaned up:
It seemed easiest to start with an actual tunnel. Fortunately we have a “willing” donor out back.
Which eventually started to take the right shape for us.
With only a little bit of convincing.
In the end it came out fairly well. We finished it to look better from underneath than on top because ultimately this will be covered.
I think that more material will have to come out for the exhaust but it’s a start.