No need to re-torque the bolts, I got ARP studs.. had it together took it back apart and then re-torqued them back down... no head lift can be seem, no leaks anywhere of any kind and my reservoir bottle does not fill up... so I don't believe head lift is occurring.i say getting a good fan would also help aid in cooling. make sure its moving the correct direction, and a shroud could help too.
not sure if you have a name brand radiator or not, but a cheap one could have an internal leak thats causing the problems.
I do have an aftermarket thick ass radiator.. can't remember the brand as I bought it years ago... I just know that the fan it came with was basically just a cheapy that came with the rad... I'm hoping an upgrade will do the trick.. but with this car, everything is hot ass balls under the hood... I'm about ready to take a dremel and drill enormous holes in the hood for ventilation purposes... Super ghetto extreme FTW!?