Harrop 2300 supercharger to Optimiser 6500

[PeeBee]

Maybe also try freezing the studs before installing them - should shrink them a tad and make it a bit easier. Not sure if this might reduce the strength of the stud, but they should be good to 0 degrees at least.

The studs go in very easily when they are lubricated. The lubricant does not negatively affect the interference fit, but you really don't need to do a freeze shrink fit. I initially seated the studs using a 4" handled ratchet wrench until they were seated, then finished them off with the torque wrench for certainty