If you want to go vertical I suggest you either go to your local bone yard/pick a part and grab an adapter off a Ford Ranger sized car or pick one up from someplace like this
http://www.speedwaymotors.com/Ford-R...FRRgfgodXn8Hiw.
I have one installed with the filter that came with the Mikes A Fordable "full flow" oil filter, and except for the outside diameter of their filter hitting the timing cover, it is pretty much vertical.
One thing, you will need to get a new exhaust gasket, I was able to unbolt the manifold and the muffler clamp and twist the whole assembly out of the way and hold it there with a piece of bailing wire wrapped around the fuel bowl on the firewall while I cleaned and installed the new valve cover and tube assembly.