My 2.7 had notoriously loud valve lash. Now I have a 3.2. Check the valve lash on that side again. Maybe use a ong screwdriver to determine if the tick is on intakes or exhaust. Be on the look out for snappe head-studs (I never had this problem though...).
Good luck.
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Nick Hromyak
'85 Carrera 7 & 9 Fuchs
Havin' Fun in Sacramento