Considering the amount of money you'll have tied up in your engine build and the small (relatively speaking) cost difference between the proven critical fasteners and the "other guy's fasteners", why would you consider "second best" as worth the risk?
My opinon is to buy ARP! A few yrs ago, I used another brand which begins with an "M", ( don't know if I should say which brand ), and let me tell you that I had one heck of a time getting the heads on the motor!, and when I tried to get them off, It took hours!
They were not apparently true...I ended up taking them out, and getting ARP's, put them in and the heads went on like butter, no tapping or walking them on...best of all, they came off with little resistance...no major swearing!
Don't use the Jegs or Summit generic type rocker studs. I found this out the hard way. I had 4 of them snap on me. It was wierd. It would only happen at around 5,000 RPM. Anyway, I got lucky and the stud girdles kept the valvetrain from catastrophic failure each time. I though it was a geometry issue until I finally just bought the ARP studs. No problems since.
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