69s are mounted directly to the radiator support using 3 tapping screws shown in UPC6-B7. Screws are GM# 177999 and are available through AMK as B-12096 (phosphate) or B11094 (zinc) $3 buys 6.
Can someone confirm which finish is correct please.
67-68s used rubber well-nuts with machine screws to insulate from vibration and used a ground wire to the support.