$cosworth$boy$

Hi ive just baught a ford escort rs2000 its rotten but just wanted it for the engine and bits as im doin and engine swap with my ford escort cosworth replica just wondered would there be any complications doing the engine change the current engine in my escort is only a 1.3 pushrod engine and im converting it over to rs2000 running gear engine gearbox and wiring look and a few other bits does anyone know of any complications that could occur and once its in what are good things i can do to tune it ive already got a few ideas on mind just wondered if anyone had any thoughts thanks Brian ?????