>hi,
>
>have a set of nice heads that i got with a parts car, and thought that they
>were for an air cooled VW, but on closer inspection they look like old
>porsche heads.
>

Probably from 914/912E <1976, possibly 912/356 older style engine <1967. 
There is a Porschephiles list, 900+ members and lots of traffic. I'll look 
for the # in a parts catalogue for you.    tim s.