oil pressure and crankcase pressure

when i put my 318 together it had way too much oil pressure and i don't know why, it blew the oil filter completely off of the motor. I changed the pump and pick up and relocated the filter after running a piece of coat hanger down where the oil goes back in from filter didn't see any dirt or anything come out or fall down in. never seen this happen before. then the relocation kit from jegs isn't really long enough so i need a longer one to get filter where i want it to be. has anyone else had any problems with too much oil pressure i think there might be a crankcase pressure issue too because when i rev it up it pushes the dipstick out.