Got it all back together finally. Replaced the seal and no more leak. The oil pressure sending unit connector was loose, so that's why no oil pressure. All.good now.
So it is advised that no one uses Performance Engineering in Hamilton. First time took 2 months to get it rebuilt, only to walk 2 bearings 3000 miles later. Second time took 6 weeks to get back only to find a mangled rear main seal. This is why i do my own work.
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