I have a 1955 Crown Vic with a 1961 292 in it that My dad gave me before he passed away 1 1/2 years ago, Trying to work all the bugs out of this thing. He either had motor rebuilt or cleaned it up on inside it's not all slugded up. So I started hearing a lot of clattering under valve covers & decided to adjust rocker arms & when I had valve covers off I decided to run engine to see how well it was oiling, left side had plenty of oil flowing & right side had hardley any, so I pulled rocker shafts & right side was pretty much worn out. I then pulled out the distrubutor & hooked up my drill to run the oil pump - left side started oiling & it took another 20 seconds to get oil up to right side head & it seemed like it was not flowing as much as left side. I then took rocker shaft from left side & bolted it on right side & ran the drill again, the oil never even made it to front drain pipe or to front 2 rockers, maybe my drill doen't spin as fast as the engine running?? I then took same rocker shaft & put it on left side & ran pump & oil flows all the way to front rockers, so my question is It can't really be the cam bearing hole not lined up or not deep enough groove in camshaft because one side oils just fine- I shot a bunch of carb cleaner down oil gally in head & blew it out with air but it didn't help. Maybe I should put it back together & run engine without valve covers on to see if it is oiling now, maybe I had a plugged shaft on right side??