cylinder head identification

how do i find out what cylinder head if got. iv looked at the head and the numbers are 53 026103373g. simple reason my engin is running and i wont to know if head is ok to to do a 2.0 bottom end

 

1985 07-1987 EV hydro head, also can be audi DZ head

 

Will this head be ok on a agg bottom end, also is the castings good for big porting ?
Thanks

 

See here

http://www.clubgti.com/forum/showthread.php?t=220746

 

Thanks for the link mate, iv worked out that iv got a EV head with hydro lifters, what 2.0 bottem end would be the best to use with this head, I can get a AGG easy enough