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ldreeg · 10-02-2023, 05:35 PM

I'm installing a Brumfield High-Compression head (not sure if it is 5.5 or 6.1).

Should I replace the original head studs with Chrome-Moly or Grade 8 bolts? Or re-use the original stus?

Bratton's has Grade 8 with rolled threads, guaranteed not to stretch and Snyder's and Bert's have Chrome-Moly, guaranteed not to stretch.

I read here that you want a little stretch. What is recommended?

Also, with the stronger head studs, they recommend 65 ft lbs of torque.

I broke the ear off my early 1930 style water neck at 55 lbs.

Thanks.

10-02-2023, 05:35 PM	#1
ldreeg Senior Member Join Date: May 2010 Location: McKinney, TX Posts: 545	Head studs I'm installing a Brumfield High-Compression head (not sure if it is 5.5 or 6.1). Should I replace the original head studs with Chrome-Moly or Grade 8 bolts? Or re-use the original stus? Bratton's has Grade 8 with rolled threads, guaranteed not to stretch and Snyder's and Bert's have Chrome-Moly, guaranteed not to stretch. I read here that you want a little stretch. What is recommended? Also, with the stronger head studs, they recommend 65 ft lbs of torque. I broke the ear off my early 1930 style water neck at 55 lbs. Thanks.