Previous engines did not have the MLS gasket and did the usual T series and M series and O series, weep from the cylinder head/block join around the cylinder number 4 corner, at the front. You will see it immediately, sometimes it is just a little damp corner with some dried oil indicating hardly anything, other times it is gushing out. Is that so in your case? Mine weeped a bit at 30000 miles and the head was skimmed before it was replaced.
Engines can be retro fitted with the newer head gasket but the oil restrictor in the block needs to be removed, which can usually be done with a screw and a pair of mole grips. Cleanliness is paramount and every minute spent in preparation of the head and block surface is vital and they should be perfect for the best end result and no more oil leak.
Cam covers always leak oil, and need cleaning up and new seals. It's easy to strip cam carrier bolts when putting cam carrier back because the T series uses 8 or so large bolts, which when you are doing the carrier up have to depress the cam, so these bolts need doing up in sequence, very progressively.
p.s I sourced my head gasket from Phil Wareham at Brands Hatch Morgans.
Last edited by meabh; 18/08/16 12:34 PM.