I have a 1994 camaro v6 Hardtop crashed. and can get a 1999 z28 convertible. both are manual. is it possible to make it that the 1994 camaro has the LS1 engine and Transmission and the 1999 front bumper side panels and hood. practically just switch the whole bodys and some parts.

 

Yes it is possible. If you have the k member from the 99 just bolt it up, also the body panels just bolt right on but you need to use the hood, lights, fenders and nose.

 

why not just keep the 99? I wouldn't do it personally, way to much work on a wrecked car that will never be worth what you put into it. You can get fully functioning ls1 cars in great shape for 10k and under, and half that for a lt1 car.