Fresh from winters hibernation, took Z out for a short ride. Hit a mile stone of 70,000 miles. All good until I returned home and found my recently cleaned motor had oil sprayed on passenger side of motor and firewall. Found the pump decided to blow oil out of the weep hole. Over the winter I bought a new Nikki fuel pump, rebuilt the top half of the original pump. The bottom part containing the rubber shaft seal appeared to be fine so it wasn’t changed. Cleaned up the mess then removed and disassembled pump, sure enough the seal was torn.. Luckily I saved the remains of the donor fuel pump, swapped out the seal and reassembled, hopefully it last another 54 years.