WRC BLOCK AND HEADS?
 

Found these For sale and it looks to me to be a linered CDB with cylinder heads machined for WRC style head seals.

Any thoughts ?
https://cimg5.ibsrv.net/gimg/www.sco...a1933f60e5.jpg

saves a bit of work if they are done right but still needs to go off to the machine shop so at least they could check everything properly while its all there