:D At last, the mystical realm of the tensioner can be revealed. When I first got the afore mentioned item I thought.'Hello, there's a threaded hole behind the wheel. I wonder if I have to remove said wheel before bolting the thing to the block'. After getting the car over a pit at work and looking at it from a different angle, I noticed that the bolt enered from behind the tensioner. Thoughts along the line of 'DERR' and 'PR*%%' flashed through the old noggin. No need to dimantle tensioner, just raise the car up enough to get behind the tensioner and the job is quite straight forward. Good luck to any one about to do this job, and thanx to all those on this forum who helped with advice. ;)