Keith -- with all the work you are doing on your car, invest in an 8 oz. tub of antiseize. I must admit, that special high temperature formulation (Permatex anti seize 77124) is pricier ($12-$20 from on-line vendors) than lower-temp nickel or copper anti-seize compounds. I lightly lubricate many fasteners with anti-seize, especially steel fasteners in aluminum threads or other places subject to harsh operating conditions (wheel lug nuts in winter). Reduce tightening torque values somewhat when using anti-seize because it lubricates the threads.

Chris in VT, '94 945 w/172K