I could not get a Ferrari 308 GT/M in 1/43. As far as I know the only available model is made by Tron and the few available are awfully expensive for what you get. So I decided to buy a Ferrari 388 GTO Evoluzione made by "joef evolution" and use it as the basis for the Ferrari 308 GT/M.
This is the original Ferrari 388 GTO Evoluzione made by "joef evolution"
The following photo sequence depicts how it was built.This is the original Ferrari 388 GTO Evoluzione made by "joef evolution"
First cut all the required openings to convert the model
Cut he side walls of the cockpit leaving a side bar
Modify the engine (remove turbos and intercoolers)and fill up as required with epoxy.
Then the final result is: