Need some help !!!!!!!!!!!!!!!!!!!!!!!!!

Just got back from a short 3 mile drive and saw the oil around the T-stat housing. I just can't win with this thing. I wont let it beat me though. I have another 340 here to transfer all the parts to, if it turns out the block is cracked internally. Would a head gasket cause this. I have in the past had a head gasket blow and leak coolant into the cylinder but never anything like this. The oil on the dipstick looks clear like it should.