I have a 350 stock motor, it was in my 77 nova i tool it out and put it in my 87 camaro. After a couple of weeks it started to leak from the front & rear seals, while it sat on the trailer ( not running). and it poured out while running. I took off the drivers side valve cover while the motor was running & it was blowing oil out of the vent hole between the # 1 exhaust & intake rock arms. I was told that one of the pistons had a hole in it, or the rings were broke. So i took it apart and found no holes in the pistons & no bad rings. so what do yall think.