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Clearance issues using 7/16 studs on iron #6 heads

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Old May 3rd, 2018, 08:17 AM
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Clearance issues using 7/16 studs on iron #6 heads
Is it ok to mill rocker for clearance
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Old May 3rd, 2018, 02:48 PM
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What lift cam. You can mill the rocker for additional clearance, but shouldnt have to if those are HS Olds rockers.
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Old May 4th, 2018, 03:40 AM
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565 lift solid flat tappet cam
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Old May 4th, 2018, 03:50 AM
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Originally Posted by 70W-32
What lift cam. You can mill the rocker for additional clearance, but shouldnt have to if those are HS Olds rockers.
solid flat tappet 565 lift I have 5003 HS rockers.
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Old May 4th, 2018, 04:37 AM
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Yes you can mill the rocker pads.
looks like you’re poly locks are really close to the rocker at max lift. I’d check underneath to make sure the pushrod isn’t hitting the rocker as well
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Old May 4th, 2018, 06:06 AM
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Holy big solid cam, I figured big by how much the spring was compressed. What are the other motor specs?
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Old May 4th, 2018, 06:07 AM
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Originally Posted by cutlassefi
Yes you can mill the rocker pads.
looks like you’re poly locks are really close to the rocker at max lift. I’d check underneath to make sure the pushrod isn’t hitting the rocker as well
so can I mill where the rocker is hitting the poly lock
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Old May 4th, 2018, 06:13 AM
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Originally Posted by olds 307 and 403
Holy big solid cam, I figured big by how much the spring was compressed. What are the other motor specs?
355 speedpro flat top pistons, Edelbrock intake, 455 valves, heads and intake ported to match.
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Old May 4th, 2018, 06:23 AM
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I assume some stall and gearing as well, what car? It should go like hell.
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Old May 4th, 2018, 07:22 AM
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3.73 gears 3000 stall in a gbody 87 cutlass
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Old May 4th, 2018, 10:00 AM
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Originally Posted by mr.rocket
so can I mill where the rocker is hitting the poly lock
It shouldn’t hit there at all, especially with that amount of lift. Are you sure your geometry is correct?
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Old May 4th, 2018, 10:21 AM
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Originally Posted by cutlassefi

It shouldn’t hit there at all, especially with that amount of lift. Are you sure your geometry is correct?
yes we checked it twice riding the valve perfect in the middle.
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Old May 4th, 2018, 12:32 PM
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Originally Posted by mr.rocket

yes we checked it twice riding the valve perfect in the middle.
somethings not right, shouldnt need to clearance those rockers at that lift
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