^ haha andrew i can relate, i just bolted my head down last week with the ARP studs and WHAT A PRICK!!! half inch multihex didnt fit down the hole, had to buy a 3/8 multihex socket in 1/2 inch and that fouled on the tops of the studs so went back again and got the same 3/8 socket but in deep. NEVER again i say.

When i took the stock bolts out i had to use a 3/8 10mm hex bit i bought from my local total tools for like 6 bucks... worked a treat.

Hayden