ARP makes a reduced sized head on there header bolts. IIRC, there 5/16th.
My own personal "Danm that was a pain" would have to be installing the 4spd manual trans on my back on some really crappy uneven broken up pavement. 8 hours of fustration on my back. Sore muscles.
The job was completed in 5 minutes once my best buddy showed up. My wife. She came home from work floored I wasn't done and ripping up the hood leaving stretch marks all over town. So I told her I needed her at the front of the car handling the jacks positioning.
Like I said, 5 minutes and we were done. I finish bolting it to the bell and called it quits! Sore and tired as heck, I didn't finish the job till noon the next day.
