Before you put the engine in put a new cambelt, tensioner, and camshaft variator on it, as if you had to change these in the future its a engine out job to do- officially anyway.
See if you can get the coupe' brakes on the bravo as well- 155bhp to 220 bhp, you'll need more stopping power.
Main problems i imagine would be:
placing/positioning the turbo hoses and intercooler/ oil cooler in the bravo,
Engine ecu matching the code ecu and keys- have you got all keys from both cars especially the red ones.
Good luck