SG-1, Ferrari 375 B

Some time ago i get a nice projekt a SG-1 Standard from 1974. It was the first car SG produced in series. In the meanwhile i get all parts to made the car ready, inclused clutch, exhaust and engine mounts. With an other car i get this super painted ferrari 375 B body. It is an body from SG, the label is printed on the front wing. I do not found the body in any catalogs, but i think it must be an old one. I decide to take this body on the SG-1 chassis. Now i have the next problem, when i put an engine in, i must cut out this great body. I am not sure if i let the car without engine or if i cut out the body, any ideas?