I appreciate the comments. Thank You. btw- the 'pointer' in the diagram you mention is out at the end of the Spanner wrench showing that 'just' putting a spanner wrench for Outer Trox bolt E10 (socket into pulley) on it and pulling up will release the tension.

Because the Previous Owner say motor was rebuilt, I even wnder if it is the same as the year the car was built. I'll look around there tomorrow with a 19mm & a 13mm handy. Thanks,
tt