you only use the rubber insulated engine mounts for the swap, use all the ae92 mounts, you dont have to swap the any parts from the block or gearbox brackets between motors. You only need to swap the mechanical speedo sender from your C50 to the C52, which is a simple job as there is 1 10mm bolt that hold the sender in on both boxes.
I used the 4afc radiator as the top tank has the outlet in the right place and the ae101 item was too tall.