I have pulled my engine to work on the rear seal area it appears to be leaking through the dowel pins.I have thought about trying it but never did. After I installed the hot oil box the engine couldn't run any smoother and also had more power.
I usually relocate the oil dip stick to the rear of the engine case. Lot easier to use instead through the nose bowl air opening.
In the process I got a image of my crossover tube. I have never run without it. The Engine is smooth. I am now planning a hot oil box around my Y-tube. I noticed a fuel atomization issue when the OAT is below 38f and the throttle is below 1,000 rpm.
The warmed intake should resolve this and help in all seasons.
Dan can you show me a close up of your dip stick mod? Mine is hard to get to in the bowl.