Ok I think i have got the casting number thing fiqured out.
Yeah the heads cant be 883 or 882 for that matter these are suppost to have 2.02 and 1.60 values. I believe i have top pull the value cover to get the casting number off the head is this correct?

Also guys do any of you have any reference books that show a long water pump Number 3927170? Dated A18 9. One guy told me it was not in any book or listed anywhere.

Thanks,,