Nice Jerry.
Strangely, I find the Marantz stuff of that era far less exciting to look at as I used to. Like you, I would often find myself drooling over that sort of gear and I owned a few of their receivers over the years (though never a quad model), they somehow don't seem to hold the same magic for me anymore - however I still go gooey for the Sansuis!
I'm sure you'll enjoy owning it - everyone should own at least one 70's receiver in my opinion!

If you need a service manual, you'll get it here