Im turbo charging a RS 1800 engine, is there an adapter plate for the manifold and head to marry up or do i need to drill and tap the head, also could i use a standard turbo and manifold off an S2 or FRST.

One last thing, ive bought a standard intercooler off a FRST but the standard radiator doesnt seem to leave enough space to mount it!!
Any ideas

Thanks very much