Whew! I feel better now. I just bought the bolts at Home Depot, rated "8.8" on the head. I'll see how it goes. I'll feel better once the turbo & exhaust are removed (gotta be 75+ lbs there), and better yet when the head comes off. Oh yeah, that will be the next fun part - trying to crack the head bolts loose with the engine on a stand!

I'll probably brace it against something, as the force needed to loosen those suckers is surprising.
Thanks everyone!