Running very well now thanks mate, despite what the lump hammer wielding Chav man says lol.

The conversion was quite easy really. I got a local engineering firm to drill the holes for the CPS and turbo oil return. Changed the pistons and voila - turbo CVH with the original engine number.

The only difference in the casting is that the turbo block has a proper drain internally, whereas if you have the hole drilled the oil will run down the inside of the block unless you get a "spout" arrangement fitted.

I would definately do this conversion again, its so much quicker than it was before