2.4 is a cih engine. there found in many cars, omega A etc.
i'm not sure about clutches.
http://www.mantacabrio.nl/ombouw-2liter-16v-in-manta-b/
you need google translate for that one lol but it's a full how-to for a c20xe in a manta B. most of it goes for youre build aswell.
