[gost]

Makes total sense. The old/rust factor would definitely provide inaccurate readings with just a torque wrench. Although the angle method would also be subject to the same variances. Seems like, and I agree, that getting the bolt tight to a certain tolerable small range is sufficient. It just can't be spot on especially using old hardware as you mention. I will remove the 4 bolts and clean them up as you describe. I will leave the remaining head bolts alone. I could smell disaster in the air with that one.
Thanks so much for your thorough response Chris. Brought back memories of my Strenght of materials course in College.

Respectfully

Gordon