engine trouble...

I've got a 360 with a real bad noise in the motor was fine when car was put in storage, but when we started this spring man what a sound,thought it was the flex plate it's not . now for my question I have a good 340 motor complete, will the heads and intake off the 360 go on the 340 motor,in case the 360 is hurt??? thanks for the advice you guys are great thanks Doug....