I need the HAMBs help to know if my oil pressure is normal. I have an AV8 build with a 59ab flathead that came out of an industrial welder. Before installing the motor I took the oil pan off and scraped and cleaned the sludge out and did the same under the intake manifold. There wasn't a lot of sludge like other flatheads that I have cleaned but enough. I also put a new oil pump screen on as well. Well I am running a beehive oil filter from offenhauser and am not running a full flow system. I did solder up one of the fittings on my inlet side of the oil filter and drill a .060 hole for restriction. So when I crank the flatty I have around 60-50lbs of oil pressure and it stays that way till the motor gets warm from driving. As I am driving it shows around 5 to 15lbs and some times a little less while driving and idling at stop signs. I did notice that the top cover on my oil filter seems to leak a little oil After the car has ran and got warm. The oil filter isn't mounted vertically but has a slight kick pack to it due to it being mounted on a 1929 ford firewall. Could this leaking oil filter be any of my problem? Its not leaking a lot but is noticeable and not sure if it leaked every time. I am running 20w-50 valvoline racing oil that has the zinc in it and probably have drove the car a total of 10 miles since it has been done. I also put 5 qts of oil in the engine 4.25 QTS in the engine and .75 QTS in the oil filter. Does any of this sound out of place or is this oil pressure normal for a flatty?