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Re: Pushrod Holes in Magnum Heads
[Re: jeebis44]
#2439811
01/24/18 12:38 AM
01/24/18 12:38 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I would mockup with some light springs & just eyeball how much clearance you have like in Joesixpacks' nearby thread then dremel em out as needed. set the heads down easy on the head gaskets & barely snug each head with several head bolts & mockup the valvetrain & turn the crank over with a 1&1/4" socket/breaker bar.
live every 24 hour block of time like it's your last day on earth
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Re: Pushrod Holes in Magnum Heads
[Re: jeebis44]
#2439812
01/24/18 12:38 AM
01/24/18 12:38 AM
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Joined: Jan 2005
Posts: 12,423 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,423
Kalispell Mt.
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I have never had to clearance them, done a bunch and even with one like an R/T head with a machined hole never had to clearance one.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Pushrod Holes in Magnum Heads
[Re: jeebis44]
#2440189
01/24/18 07:16 PM
01/24/18 07:16 PM
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Joined: Jan 2003
Posts: 1,238 Chicago, IL
PLUM_72
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,238
Chicago, IL
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Wasn't there a magnum head template floating around between the forum users to drill this out?
1972 Dodge Challenger
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Re: Pushrod Holes in Magnum Heads
[Re: jeebis44]
#2440351
01/25/18 01:49 AM
01/25/18 01:49 AM
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Joined: Jan 2005
Posts: 12,423 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,423
Kalispell Mt.
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the template is for porting, there was a jig for doing the intake bolt holes, I never had an issue with PR clearance but I have also never tried to run them with anything bigger diameter than a stock one. If there is an issue it can't be much just mark it and grind it a bit with a dremmel.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Pushrod Holes in Magnum Heads
[Re: jeebis44]
#2440363
01/25/18 02:13 AM
01/25/18 02:13 AM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Been my observation that roller heads have bigger pushrod holes than flat tappet heads so I wonder why you'd need to open up the magnums?
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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