4g240

Can anyone tell me if a a340e automatic out of a Toyota Supra will fit into a s13 I have looked all over Google and other sources and nothing other then someone is using it in a s14 and going 7s. But that doesn't tell me if the chassis had to be modified cut or bashed to get it to fit. Need my car mobile in the next few months and these are basically free and I already have a transmission controller that is just sitting. I'm going manual in the future but for now just need it to drive.