Im back on the road. It took me a long time to fit the rolling rocker kit though.
firstly, the studs are on very securely. After failing with the two nut trick, I had to try a number of different stud extractors. Eventually a collet style one worked but it ruined the old stud's top threading.
a second challenging part is creating clearence for the push rods. Unfortunately the geometry is slightly different for the rollers. On both the intake rods I had to file away around 2mm of aluminium from the top hole on the heads so as to gain sufficient clearence. Otherwise the conrod would bash the top of the hole which has a slight lip.
this is problematic because tiny bits of aluminium will get into the engine. I used grease to get most of it. Fortunately the oil system is designed so that oil drips from the head down to the cam chest and then back to the tank. Then back through the filter before the engine again. so it should avoid the main bearings.
The instructions from s&s are very good.
the kit comes with new head gaskets and loctite.
they should give more than 5ml of loctite.
The noise is definitely quiter with these roller rockers.
you have to be careful to let the tappets settle between cylinders.
So I recommend having extra loctite 262 and a good stud extractor before attempting.