When I installed mine I used a low strength thread lock on the studs into the block and torqued to 50 lb/ft, the thread lock was more to stop the water penetrating and rusting the threads should I ever need ot remove them again than anything else, I've heard that some get seriously stuck in when fitted dry and basically get ruined trying to remove them. Both blocks I've installed them in have just had the block tapped, no helicoils or timeserts.

Once the studs were installed I applied some oil to the thread of the stud and underneath the washer and bottom of the nut, then torqued the nuts in stages: 30, 60, then finally 90 lb/ft, in the same order as installing normal head bolts i.e work your way out from the centre.

I haven't got any pics of the studs installed from inside the block as it's a bit difficult to see with the naked eye let alone get a camera in there, but from memory once the studs are installed I can only see 2, maybe 3 threads protruding from above the base of the block. These were both in a 6 stud installation so this was looking at holes 3+4 & 5+6, but I doubt this would be any different on the outer holes in a 10 stud conversion.

Who made the studs?