hi folks, i am wondering if anyone can give me an idea of how to identify whether a cosworth throttle body is 2wd or 4wd, i have a throttle body on my car which has the wrong idle screw fitted, it looks to be from a different model altogether as the shape at the end of it is incorrect , i want to get the correct type air screw but i i dont know whether my throttle body is in fact 2wd or 4wd, can i use the idle screw from either? i am presuming you can, but thought id ask before wasting my time.

this is what was fitted