Hello!!! This is my first post. Been restoring my 240 for a bit now getting it back to better condition replacing all hoses and etc. While taking off the intake manifold I had the options of taking off the upper intake manifold studs that connect to the head. OR taking studs off of the lower half of intake manifold. I chose to do head since it had more clearance for the double nut method. Ruined one of the studs on the head while removing it so I need to get a new one. Anyone know the spec of it? Can't find any for sale online or specs online. Anything helps!!!! Thank you!!!