The problem with this undertaking is that the Corsa modification is only a modification of (and addition to) the already existing BeamNG.drive Civetta Bolide. Therefore, the only thing you would be able to copy without getting permissions from the BeamNG.drive developers themself would be the Corse bodykit, which is a very small part of the car.
Why convert a mod for BeamNG if you're in love with the F40, specially as there's loads of models for the car, accurate or not, oh, and you will have fun trying to make actual physics for the car. Just play whatever game that has an F40.
If you mean the GTR Variant... No. That one's (very probably) loosely based off a Ferrari 512 BB LM, while the Corse is based off a F40, and the Corse race trim is based off a F40 LM.