evening people!

im selling my 4x4 sapph cossie head on ebay and this bloke has asked me a question about it and i was wondering if someone on here could give me the answer!! heres the question as he sent it to me:-

Q: hi there just want to ask somthing will the head like this one your selling fit on the 2.oltr twin cam 8 valve sierra non turbo as i own one and im thinking of a head conversion cheers.

also, did ford actually make a 8 valve twin cam engine???
thanks