You have got some good ideas going so far Bluesman. You got it almost out. Keep fiddling without JB or other for now. Don't loose a magnet down the hole, you will never get it out.
I reuse a lot of bolts when refreshing an old truck. Body and frame bolts. Screws and hardware. Just wire wheel and use. No problem. But old bolts on head or other critical motor parts, probably should not.
When torqueing, and there is a range, shoot for the middle. (This is called the nominal) Head bolts are usually re-torqued after a few runs. As mentioned, suck out all the holes. Be sure what the depth is of each hole so as not to bottom out. Torque in proper sequence at 3-5 times around. A third to a fifth of the torque at a time. Hold torque wrench ONLY at the end. If your torque wrench is a beam style, it has two problems. 1. Not as accurate as other. 2. Has a parallax distortion issue.
