ohWOW,
WOW, working on a V-8! It's been awhile since I did this task, but I'm thinking you have to loosen the rocker arm adjusting nuts, swivel the rocker arms out of the way to reach some of the head bolts hidden between them. This also allows you to pull the pushrods out.
When you pull the intake you will have to pull the distributor too.
Do some extensive looking using Brake-Kleen and rags on your leak BEFORE you go nuts! As Brian points out above, this type of leak is very uncommon to be associated with a head gasket .
Stuart
