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  #1  
Old 04-07-2017, 08:13 PM
396mac396 396mac396 is offline
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Default 72 350 block
Are 72 350 bores chamfered for big valve 72 cc heads?

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Old 04-08-2017, 09:36 AM
A.W.Dille A.W.Dille is offline
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The 72 350 block I have in the garage is so I would say yes.

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1971 GTO,72 400, stock bottom end, 670 heads, Lunati BMII cam, headers, iron intake Q-jet, four speed. Best 60 ft 1.806in 2004. Best 1/8th mile e.t. 8.46 with 3.55 open rear
85 Grand Prix, 70 400, casting 62 heads stock rebuild, Turbo 350 trans 78 800 cfm Q-jet modified as per Cliff Ruggles book.
87 F350 6.9 4 speed dually

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Old 04-08-2017, 07:37 PM
396mac396 396mac396 is offline
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Default 350 block
I"m removing both cyl. heads tomorrow, thanks.

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Old 04-12-2017, 02:21 AM
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Squidward Squidward is offline
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I am using #12 big valve heads on a 72 350. The block has the chamfers. Just keep your lift reasonable, because big valves WILL hit the cylinder walls at a little over .500 lift. I measured .510, with basic fel-pro head gaskets.

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Old 04-12-2017, 08:30 AM
396mac396 396mac396 is offline
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Thanks.

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  #6  
Old 04-16-2017, 07:37 PM
396mac396 396mac396 is offline
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I disassembled my 72 350 and it did have chamfers on both sides of each cylinder bore, thanks for the correct information.

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