Installing Arp Head Studs With Head On?

[john]

I think Shane said he has done it before. I would never do it though as you will want to make sure the holes are clear of any oil or debris. I also like to tap them while I have the head off.
If you do it though, make sure to do one at a time. How much boost do you plan on running? Why did you think you had a bad HG? If it has been a while since you replaced the T-belt, you may as well pull the head and do it the right way. Then you can replace the HG at the same time.