Trick Flow 440 heads, The Real Deal?
Yes it takes a long time for the oil to start flowing out of the rockers and this was with a primed system at room temp. I bet it takes twice as long for the oil to start flowing on a cold engine that has been sitting over night. I'm also using pushrod oiling so you would expect the oil to get there really quick but it doesn't. Tells you that you shouldn't wing the engine right after starting it!
Valve cover is custom built for dyno work. I use it to watch the rocker arms and make sure everything is working properly. Makes it easy to see if you've primed the rockers or if you burned up a pushrod or anything like that.