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We use these cams with the Indy rockers and retainers with good results.Choose a good spring with aprox.225 to 250 lbs on the seat and 500 to 600 lbs. open.For best upgrades use 10 degree titanium retainers and 10 degree locks then you can use a little more spring pressure if you want.

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Those pressures are a lot higher than the Comp 925-16 springs.

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Those pressures I posted are for a roller cam.sorry for any confusion.The 925-16 spring is a little light at 100+ seat and 330+ open pressures but that is advertized at 1.900 installed height.Most solid flat tappet cams recommend the installed height at 1.875 or less.