I think the dowels are .250”, just like all the B/RB head dowels, and same as the chain cover dowels.

Finished getting the head off. Felpro 1104 gasket looks fine. Head surface has minute machining groove where the block is a lot smoother. Hot oil has to be wicking out from the return passage. I think a new gasket and some sealant on both sides of the gaskets in these areas and I should be ok.

I had the same type leeking on my MP block and MP aluminum head engine. I think you have the right idea coating the new gaskets.
I just wanted to add that I used these gaskets from Arruzza on mine and it solved the problem. I don't know if they are still available, and the bore sizes are limited to .070" over 4.250".

http://www.arruzzahighperformance.com/Parts/Parts.html

Mark

No pressurized oil at the front of the head.

The oil drain in each corner is just that, a drain. Most of the oil goes to the back due to engine angle on most cars.

Hard to believe the source of the leak has anything to do with the intake. First thing I would do is pull the valve cover and check head bolt torque.

You would think. Let me share my oil leak frustration. I had same oil leak. Used three different head gaskets and still leaked. I had the engine on a run in stand so it wasn't an awful job to swap out, but still major pain. I tried sealant around the drain, coating gaskets, non-hardening sealant, Hylomar, etc. I noticed that the leak would move up the more sealant I added to the drain. So one day I was in the office shooting the bull with another mopar guy and we started sketching the oil system on the board. We drew up the pressurized passages and then started playing what ifs. So I knew there is pressurized oil in the rocker shafts. And that the rocker shaft pedestals for the supply line had holes drilled to supply the shafts. What if the front stands were drilled too? Pressurized oil could get down to the head/block interface. So I removed all the pedestals. Sure enough 6 out of the ten had oil supply holes drilled. These were aftermarket stands and I do not know who made them as they came with my box of rocks. So I tapped the holes on the non supply pedestals and inserted a set screw with sealant. No more leaks. PS, I call my Hemi a box of rocks because it was a large crate of parts that couldn't have worked all together. I ended up replacing some large money parts to finally get a running engine. It was an ebay purchase of a freshly machined engine just needing assembly so I took my chances. And partially lost. I did recover most of the parts.

The rocker stand oil galley is open to the headbolt. Pressurized oil is therefore on the head side of the head bolt. The head gaskets have embossing around the cylinder, water passages and oil passage, but not around the head bolt, so its easier for pressurized oil to leak out. I wish I had taken pictures. If you remove the rocker stand that is tied to the oil feed port in the head (between 5 and 7 say on the driver side), that stand will have a hole drilled to feed oil to the rocker shafts. The only two rocker stands that need, or should have the hole, are the two that line up with the oil feed holes in the block. On my stands, several had the oil feed holes. The bolts that hold the shafts have enlarged bores to pass the oil from the drilling into the shafts. Again, the other rocker stands had this too, so oil was able to pressurize these drilled passages. I think only way to understand what I am trying to explain is taking a look at the rocker stands. If the front stands have holes, then I would bet you are getting pressurized oil at the front head bolt, and since the head gasket isn't embossed around the head bolt, oil is being pushed out to the lock/head interface. I am just saying I had my engine apart three times before finding it. Once I blocked those passages in all but the required rocker stands, I had no issues.