Will a 5 speed transmission from camaro fit mustang?

No, a 5-speed transmission from a Camaro will almost certainly not fit a Mustang without significant, and likely impractical, modifications. Even if they share a similar transmission *type* (e.g., both are T5s, a common type), the bellhousing bolt pattern (where the transmission connects to the engine), input shaft length, and output shaft specifics are almost guaranteed to be different between the two makes and models. The different engine configurations and chassis designs would necessitate extensive custom fabrication to make them compatible.