Hi I have a Sierra sapphire L6 ecru in my transit van with cosworth engine in and a word with Stu at Motorsport developments said to upgrade I need a L8 ecu and tps for same then he can map / chip it. So that's the information I have you could ring him and just say it's for the guy with the cosworth mk3 transit I have had it at his place then I would buy whatever he said I needed.
Cheers