[Roslin]

Nice Restoration Fred !
Saw earlier your problem by squishing the O-rings on the case trough bolts. I had the same problem when i did mine, and discovered that the stock Porsche washers where very unequal in the chamfer size. I then decided to make a complete new set of washers with two different chamfer sizes and a small radius to prevent the washer to 'cut' the O-rings. One size for the threaded side and another for the other side. The result was 100 % as i wanted it to be - nicely compressed O-rings, and no squished and damaged O-rings - This was made in 2006, and no leaks has been discovered since.

I look forward to see you dyno results when you get it rolled, as i'm interested in your upgrades whit raised C/R and twin plugs