Good base mold for a car transformer?

Hey all. I bought a model to cut up and kitbash into a workable transformer.
Trick is, I need some kind of skeleton upon which I can base it.
The car is 8.5" nose to tail, 3.25" distance between wheel arch inner edges 5.5" between outer edges, the model's 3.25" wide by 2" tall.
It's a 1996 Ford Thunderbird, specifically the Monogram model of the #10 Tide Nascar Thunderbird.
Thanks,
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Trick is, I need some kind of skeleton upon which I can base it.
The car is 8.5" nose to tail, 3.25" distance between wheel arch inner edges 5.5" between outer edges, the model's 3.25" wide by 2" tall.
It's a 1996 Ford Thunderbird, specifically the Monogram model of the #10 Tide Nascar Thunderbird.
Thanks,
Switchback