Originally Posted by
murray87
Oil return was modified to sump from former owner, have invoiced for sump being modified to take oil return, I had thought this was due to using cossie turbo needed a larger diameter return.
have a look on the front of the block for signs of the original oil return if its there is ok, if not then it could be a N/A block from a xr3i or xr2i and would need to be swapped out as soon as you can.
also iirc there should be no extra work need for a cosworth turbo apart from different down pipe.