I haven't the slightest idea what your talking about so you need to explain it in more detail.
Its basically about making a big body kit to fit over the Intrepid and similar platform models.
So you have funding for this kind of project? These are serious custom fab body kits.... like near 100% new sheetmetal.
Are you aware of the structural consequences of cutting the roof off of a uni body car?
Im hoping my first kit for my 90's Nissan 300zx, which Ive yet to make, will fund this.
Here is what I expect the budget to be.
For the donor;
$1500 Intrepid (seems like the slickest to start with)
$1000 lowering suspension
For the build;
$500 in foam for my CNC machine to cut the panels, the machine is still in construction i.imgur.com/EMju0.jpg
$500 for plastic panels which I will vacuum form in a backyard, ground pit oven. (experimental)
$200 for fiberglass reinforcing the panels from the inside
$100 for various mounting supports
$300 vinyl car wrap
optional will be new headlights off another car ($500-2000)
After production, a kit could be possibly made for as little as $1000 and resold for $2000
Converting a car and selling it to the general public can bring in profits as much as 5-10k and even more.
Note the panels will be riveted and bolted over the existing body with possible inner ribs to keep it stiff and solid when kicked.
Making the t-top/sectional hard top roof has its own problems but considering how cool of a mod it would be, it may be worth it one day.
One big concern is if it's legal to make a convertible conversion in the first place, which it should be because all the new cars should have strong enough A-pillars to withstand a roll over.
Other concerns are minor if one is intending to keep the car as a cruiser then maneuver in high speeds.
There is a thread on making a convertible but I've yet to read it.