I was driving my 68 oldsmobile the other day and i noticed the temperature rapidly climbing, also the oil pressure began to drop. It is usualy around 35 or 40 however it was about 20 when driving and would almost hit 0 when stoped. I replaced the leaky bypass hose and the thermostat (165 degree). Temp seems to be OK now but the oil is still dropping and staying VERY LOW. What gives?