To my knowledge, the crankshaft used in 951 Cup (Rothmans or European Cup cars) were the same as the ones used in the street 951...
It looks like this is a modded crankshaft with just the "Rothmans Cup label on it because it's easier to sell it like that*... but i may be wrong...

* as a lot of other parts, once you call it "Cup version" everyone think it's better, more expensive, faster, etc... whereas only a small amount of parts can really be called "cup parts"

 

thanks oddjob, im going to check it out tommorow. for 200obo. in canadian im thinking its pretty cheap..
thanks for all the help guys....
hmmm... maybe he has the manual steering rack as well.. he said he had a bunch of rothmans parts...