Check out the "Vintage" forum as well as do a search...
...I've seen a few threads concerning the "claka claka" sound upon warming up, and it has something to do with oil pressure component fix...my Dad's 71 2.8SE made that noise for years and we never knew why...
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car