I have a B20 engine in my 1967 122S.. I have a oil leak and I am pretty sure it is coming from the seal on the timing cover.(bottom pulley) I really have not looked very closely at it yet.. I looked at my Haines manual and it appears that you just remove the nut on the pulley and the pulley is supposed to come off easily they say.. When I bought the car there was a new timing cover with a seal included for some reason..I had planned to just take the new seal out of the new cover and slip it into the original cover for an easy fix.. I am just wondering if these timing covers are prone to cracking or whatever at it seemed odd that the previous owner had bought a new cover when only a seal appears to be needed.. I do not have a new gasket for the new cover hence my easy fix plan.. Anyone have experiance with this problem.. Thanks !!!