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Message: [QUOTE="golfer, post: 576679, member: 266"] Here is a picture of a core 6.4L engine we use for mockup/measuring/etc..I had one of the guys in the shop pull the head so I could take a picture to let those, here interested, visualize what & where this 'casting' line is. the casting line does intersect with the threaded bolt holes, but it is not anywhere near the bottom of the blind hole. for what it's worth, we use the A1 studs exclusively for head fasteners, installation for all applications is: clean debris/fluid from the hole with brake clean & compressed air, install the new stud with a small amount of clean engine oil on (block side) threads, bottom it out in the block, and back off 1/4 turn prior to, installing, lube, nut, & torquing the nut. [/QUOTE]

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