[snowman]

I suspect not. The stretch guage is difficult to attach and get around everything that gets in the way with the bottom end open. With it togather its probably near impossible.

If not opening up the bottom end I would use stock Porsche stretch bolts. These use a torque to angle method to tighten that can be readdily done with the bottom end closed. Please note that this torque to angle method differs from the one discribed by ARP in a very important way. ARP discribes using torque to angle with a reusable bolt which leaves it undertightened due to the necessary safety margins. However using stretch bolts, which cannot be reused, one thighens the bolt beyond its yield point, but just short of its breaking point. Its impossible to get more out of a bolt. The stock Porsche bolts are likely much better than an undertightened ARP bolt. Thats my opinion.

PS Its not possible to (safely) fully tighten an ARP bolt without using the stretch guage.