Reply to "bolt-down style roller rockers"

...I Realize I was NOT asked! Buy if I were asked for My 2 cents worth, I would add...

Although I have not seen any reports of the 'Pedestal' Mounting Bolts Snapping Off!
There IS a Huge Difference in Strength Between a 5/16" Hardened 'Grade 10' Allen Bolt and a 7/16" ARP Rocker STUD!! I Have One word for it...SKIMPY! If Your going to go that Route, You might as well leave IN the 'Multi Groove' Valves, as well, for that Class of thinking.
I Imagine 'That'(Pedestal) set-up is fine for 'Mild' Cruzing around the Neighborhood Streets and Highways; BUT! When the Day comes, When You find yourself beside the 'Competition' whom Insists on Challenging the Power of Your Pantera, And You feel the Impulse to Defend the DeTomaso 'Honor'!...I like Knowing I have My 'Mechanical Insurance' in 'Massive Overkill'!

That's just THIS Machinists' Opinion!
Turns out, Most Whom Don't Listen to Me Now...Will Believe Me Later! That's just the way it is! Especially when the Pedestal Kit costs $400.00 and ANY Machine Shop will Mill, Drill and Tap Your Pedestals for a Mere $200.00!!
I'll close with:
The 'Minor Diameter' of that 5/16-18 NC Thread is only .2443"! And the Harder a Steel gets, the Closer it becomes as Brittle as Glass! Before Tempering. If it's even Properly Tempered at All!