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Old 04-18-2022, 12:36 PM
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Originally Posted by nocigarette
what gasket do I buy to drill the pattern any idea?
check this for your split top's 27-841234.........the 500 EFI is a standard bolt pattern

27-841234: Search Result | eBay
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Old 04-18-2022, 12:44 PM
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Originally Posted by F-2 Speedy
check this for your split top's 27-841234.........the 500 EFI is a standard bolt pattern

27-841234: Search Result | eBay

damn. Quick response. U always were a mound of knowledge I remember u answering a ton of questions back when I had my old magnum. Thanks again.
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Old 04-18-2022, 12:52 PM
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Originally Posted by nocigarette
damn. Quick response. U always were a mound of knowledge I remember u answering a ton of questions back when I had my old magnum. Thanks again.
Non relevant question but what magnum did you have - 27’? Damm I loved that haul. Cuts the waves like BOSS!
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Old 04-18-2022, 12:53 PM
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Originally Posted by nocigarette
what gasket do I buy to drill the pattern any idea?
Exh gasket recommended for Edelbrock/GM 315cc aluminum head

Stainless marine sells a gawd awfully expensive jig /template to help. $750 i think. Doh !
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Old 04-18-2022, 12:57 PM
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Originally Posted by nocigarette
damn. Quick response. U always were a mound of knowledge I remember u answering a ton of questions back when I had my old magnum. Thanks again.
Those header flanges are a pita to drill ask me how I know........
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Old 04-18-2022, 01:22 PM
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Probably easier to drill and tap the heads to the conventional bolt pattern
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Old 04-18-2022, 02:02 PM
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Originally Posted by F-2 Speedy
Those header flanges are a pita to drill ask me how I know........
Enquiring minds want to know
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Old 04-18-2022, 02:12 PM
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Originally Posted by SB
Enquiring minds want to know
I drill out 2 pair of CMI sweepers to fit the AFR heads.......................... the flange is hardened stainless
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Old 04-19-2022, 08:51 AM
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Originally Posted by nocigarette
that was my thoughts. Prolly be the fastest solution also.
wouldn’t I have to change or redrill my Cmi spit tops to fit the head configuration?
Dont fuk up those headers to fit those outdated heads. Buy brodix 298 RR or AFR 300 heads, run an edelbrock dual plane. Should make lots of torque and more power than a normal 525.
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Old 04-19-2022, 05:42 PM
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Originally Posted by hogie roll
Dont fuk up those headers to fit those outdated heads. Buy brodix 298 RR or AFR 300 heads, run an edelbrock dual plane. Should make lots of torque and more power than a normal 525.
Not sure on the Brodix, but you cannot find a set of BB AFR heads for like 12 weeks. (maybe you can get the Enforcer heads, but the magnums are unobtainable).
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