How about a battery hold down, seat belts, and 2 throttle return springs? What wheels do you run on there, do you need long wheel studs? The tech guys can be sticklers if they want. Also a good idea is a torque strap on the engine so you don't break the motor mount with that 4 speed.
Question, at what ET with a 4 speed are you required an aftermarket bellhousing? Another one to check on before going.